The foremost tombstone immediately behind the grave, pictured here:
https://wow.gamepedia.com/File:Lion%27s_Rest_Writing.png
I figured out the Common alphabet from this:
ᚫ - A
ᛒ - B
ᚲ - C (Same as K. C can also be represented with an S when making that sound)
ᛞ - D
ᛖ - E
ᚠ - F
ᚷ - G
ᚺ - H
ᛁ - I
ᛜ - J (ᛃ is used when making the Y sound)
ᚲ - K
ᛚ - L
ᛗ - M
ᛅ - N
ᛟ - O
ᛈ - P
ᚲᚹ - Q (Represented with KW)
ᚱ - R
ᛋ - S
ᛏ - T
ᚳ - U
ᚹ - V (Both V and W have the same symbol)
ᚹ - W (Both V and W have the same symbol)
ᚲᛋ - X (Represented with KS, ᚲᛋ)
ᛃ - Y
ᛉ - Z
ᚦ - TH
Now, for the main plaque, literally translated it comes out to this:
HE SON OF -TORMWIND- LIES HERE ROKEN IN TWO BY HIS WEAKNESS HE LIVED BY THE SWORD. ORGED TOGETHER AGAIN H GREATEST KIN THE KINDOMS OF LORADERON HAVE EV EVER SEEN. HE LEAD THE MIGHT OF THE ALLIANCE WITH PRIDE. E LIVES FOREVER IN OUR HEAV HEARTS REST IN PEACE OH SON OF STORMWIND.Which I've managed to translate better into,
The Son of Stormwind lies here. Broken in two by his weakness, he lived by the sword. Forged together again, the greatest king the kingdoms of Lordaeron have ever seen. He lead the might of the Alliance with pride. He lives forever in our heavy hearts. Rest in peace, Oh Son of Stormwind.The larger portion, the main wall behind him, includes numerous artist employees' names that work at Blizzard. I won't post them all, but examples on the first paragraph include Ishmael Hoover, Cole Eastburn, Jessica Clarke, Jessica Dinh, Andrew Matthews, Daehi Kim, Matt McDaid, Patrick Burke, etc.
Hope this is helpful everyone.