This. Unless you’re playing D&D, where a paladin has to be lawful good, unless he’s an Oath Breaker, then lawful evil. It’s up to the character, really.
However…
If we were to go by the D&D guidelines for what is typical for classes, I would go by this (D&D closest classes in parentheses for comparison):
- Death Knight (wizard, necromancer archetype): Lawful evil, possibly chaotic evil
- Demon Hunter (n/a): Chaotic Neutral; does not fight for good or evil, fights for vengeance and protection of the homeland using any means necessary
- Druid (Druid): Neutral Neutral, believes in the balance of nature
- Hunter (Ranger): Neutral, possibly neutral good.
- Mage (sorcerer): Chaotic neutral
- Monk (Monk): Lawful neutral/Lawful good
- Paladin (Paladin): Lawful good, possibly neutral good (such as with the vengeance archetype)
- Priest (Cleric): Lawful good/neutral good
- Rogue (Rogue): Chaotic neutral; self-serving
- Shaman (Wild Magic Sorcerer|Druid): Chaotic Neutral | Neutral
- Warlock (Warlock) - Chaotic Evil (I’m working on a 5e home brew warlock where I have a Solar patron instead of a Fiend patron - same spells and abilities, but with good flavor
) - Warrior (Barbarian/Fighter) : Either chaotic neutral or lawful neutral
It really depends on your character’s background and how you play it. You could play a rogue as a spy working to tear down an evil enemy, and RP it as lawful good if you wanted.