ill start off from the weakest:
NOTE: i wont include skins cause if so then i have the right to also include candy cane muradin XD. these heroes are based off of the same status as they appear here.
79-probius: in lore the probes can do little more than tp things and shoot zaps from their eyes.
78-murky: generally murlocs are stornger cause they do magic and fight, but murks is a baby.
77-Lt. morales: weakest human! yay!
76-deckard: the only reason he isn’t higher is cause he dosen’t know magic outside scrolls.
75-brightwing: all faerie dragons can phase out of reality, and can abolish heavy magic… and can even become as huge as normal dragons… but for brightwing , this spot is good.
74-lucio: the best placement i found for this guy.
73-li li: she has some good magic up her sleeve, and had done brawls with her uncle chen against figures from azeroth.
72-junkrat: powerful explosions, but pretty stupid.
71-gazlowe: one of the greatest engineers on azeroth,
and can create some really powerful war machines.
70-ana: she is a great sharpshooter, but her abilities and age dont suit for a higher rank.
69-hanzo: good skills and some magic, but still…
68-tracer: unpredictable and reverses damage, but also a
stickwoman.
67-anduin: although a healer, he is a higher-than-standard priest.
minor combat experience.
66-ETC???
65-raynor: what does he have that makes him powerful?
64-tychus: has more overall experience than jimmity raynor.
63-abathur: based off of comments.
62-chromie: despite her time powers, she herself is a dragon whelp, and the bronze dragon’s code of conduct is that they cant abuse it. this is as far as she can use her powers before it becomes cheating
61-whitemane: strong light power, but unlike anduin, she uses it to hurt people 
60-d.va: can do combat, but pales before magical prowess.
59-blaze: tough and very volatile.
58-zarya: powerful weapons and big muscles.
57-genji: very swift and also magic, but the other characters also get very powerful… strongest OW characters tho.
56-the lost vikings: magicless yes, but synchronize very well and can bring down tough opponents.
55-varian: as important as he is, he ain’t that powerful
54-samuro: ancient fighting teqniques that make him a " not bad " charachter.
53-muradin: same as varian but with dwarf magics.
52-falstad: if he were ground lvl ( ofc ) , he is still very underrated due to the gryphon’s attack and the lightning magic. ( which all gryphon riders have. )
51-chen: explored the world and has powerful abillities such as some elemental prowess.
50-lunara: powerful magic abolishes and a quarter-god
49-jaina: her default skin is from back in WC3 when she was a pupil.
48-tyrande: even before her transformation, she owned a magical tiger and has excellent marksmanship and several powers from elune.
47-zul’jin: FO’ DA AMANIIII!!!
46-qhira: a versatile, intelligent hunter with many tricks.
45-zagara: can summon zerg to her call, and is very big in size, making her tough to take down.
44-greymane: vicious in 1v1, but has no magic.
43-valeera: superior to all non-magic people. and is a tough challenge to some opponents above like reghar.
42-sitches: abominations alone are a superior monstrosity, let alone the “terror of darkshire” , one of the most feared ones.
41-reghar: not only he is a master gladiator ( + gladiator master ), but is also a great shaman of the earthren ring.
40-rexxar: his animals, while mediocre on their own, can swarm a single target very efficiently, and he is also a VERY skilled , almost the greatest, beastmaster hunter in WoW.
39-yrel: thought she would be lower, turns out shes actually one of the best ( human-like ) heroes. her light magic is even better than anduin or whitemane and she also has formidable endurance and skill. ( she was defeated by garrosh even with us but since then has gained the mark of velen and the light, and is an exarch now.)
38-garrosh: very hefty punch indeed.
37-hammer: despite being in a buffed tank, she can be very easily overthrown if well focused despite her great damage.
36-artanis: master of close combat and powerful weapons, but no other abillities.
35-zeratul: defeated artanis
34-thrall: the “to be” greatest shaman in WoW, and a great warrior and tactitian.
33-dehaka: i was not fully sure where to put him, but this ought to do 
32-stukov: the greatest zerg creation outside kerrigan herself, and with great strategies and skills.
31-uther: one of the most powerful light users equal to tirion, and a bit behind turalyon then velen himself. he was so well-known that even yrel from dreanor knows him. and was actually the closest to defeat arthas the human WITH frostmourne if he didnt be kind to his former pupil.
31-sylvannas: before she gained her new powers… still, she controls minds, and ressurrects dead and has several darkness powers.
30-orphea: has very great, versatile powers from the raven lord.
29-the butcher: the fusion of tens of demons into one of the greatest demons of the burning hells outside of the evils themselves.
28-anub’arak: an oversized lord of the nerubians, whos armor nullifies most magics and physical blows.
27-auriel: despite being the angel of hope, she is actually a very exceptional fighter with her chords, and can take hope from people
26-kael’thas: was a prominent member of the greatest mages of azeroth at one point.
25-cassia: the amazons are practically superhumans… NOT NEPHALEM, but powerful indeed… and cassia is their greatest fighter.
24-maiev: thousands of years of experience, and a very deadly foe that has imprisoned countless demons and enemies.
23-leoric: several death powers, and … well idk much bout him but he is said to be strong indeed.
22-kel’thuzad: the greatest lich that has ever lived. he, too , was in the counil of mages like kael, and is the creator of the abominations.
21-mal’ganis: massive, manipualtive and powerful, and very very intelligent with various fel powers.
20-tyreal: the angel of justice himself, and a powerful ally indeed.
19-alarak: he was a bit empowered by amon, and is more powerful than most protoss.
18-fenix: can change bodies to accommodate situations, and all are very strong and sturdy, with years of fighting experience
17-malfurion: the greatest druid in the game, he weaved tornadoes to hold the landmasses together after deathwing destoryed the world. he made storms across azeroth, and has also lived for thousands of years as leader of the druids and night elves, with power storng enough to rival that of ysera, aspect of nature and alexstraza’s sister.
16-azmodan: the technical lord of hell, and with entire legions of demons under his command.
15-mephisto: possibly the greatest source of corruption in the diablo universe, and himself with great lightning powers.
14-gul’dan: holder of immense fel magics and harbinger of doom and darkness incarnate, the wimpiest character i ever had the pleasure of slaying.
13-illidan: not only a very scary foe with his blades , which he has more than 10,000 years experience with, but also a powerful wizard of arcane and some fel. a true hunter with many victims.
12-diablo: fast and immensly strong, with lightning and fire attacks, and some mind control.
11-imperius: the greatest warrior in all of creation, and the holder of several angelic powers and weaponry that no other being has.
10-cho’gall: literally mentioned as " the most insane ogre magi that has ever lived", they grew so powerful as to be capable of opposing gul’dan, and challenged the whole new council of mages, with every single one of the council with extraordinary powers, empowering the NEW guardian, son of medivh, with the second greatest staff known in WoW, the staff of medivh atiesh.
9-tassadar: practically god of the protoss, and a force strong enough to bring down the might of the overmind.
8-kerrigan: her insane psionic powers and control over the entire zerg supercolony make her one of the most powerful charachters on the list. the only reason she isn’t above the lich king is that the lich king has direct control over souls, and only immortals/ eternals can pass through the lich king barrier.
7-malthael: like the lich king, but without frost powers. the soul attacks and his power which grows per soul are very immense however.
6-the lich king: arthas , with the helm of dominion and frostmourne, can raise entire armies in an instant, and has incomprehensible amounts of frost magic and can rip souls to add to his ever-inreasing collection.
5-alexstraza ( pre cataclysm ) : the guardian of all life, the queen of all dragons, and a pretty damn strong character , being able to oppose deathwing himself .
4-ragnaros, mah boi XD: was so storng it took more effort to bring him down than deathwing, and required the night elves to bring back every single demigod of the wilds to simply push him and his forces back. his weaker state is stornger than cenarius and the 2 strongest druids combined.
3-medivh: the last guardian… he is straight up insane. he was the only mortal ( he is an eternal now ) that deathwing was afraid of. medivh made gul’dan, upon meeting for the first time, BOW BEFORE HIM IN FRONT OF HIS OWN COUNCIL XD . medivh’s last remaining book was strong enough to be used to summon the left hand of sargeras, the planet slicer, and to be used with 2 other arctifacts to destroy the whole of a planet and send half of it to another plane of existance. medivh wiped out armies with single waves of his hand, and his mother, who is weaker, defeated the avatar of sargeras and made a magic tower out of thin air. yea, these are a VERY few. hes op.
2-deathwing: he broke the world, he tore apart parts of reality, he is the aspect of death, he radiates pure energy and wears metals around his body because his own hugeness isnt enough to contain his power. his flight over azeroth changed the tides, and the event of his emerging alone is called the cataclysm… XD
1-the nephalem: godkillers, pure energy and power that is related to the supreme god of the diablo universe… ye … they hold the top xD
IF YOU DISAGREE ON SOME PART please, say so, and if they get 5 likes, ill change 
