He voiced Young Hercules in the 1997 Hercules movie
Linus from Charlie Brown show
Flash from Justice League
Spider Man from the TV show the Spectacular Spiderman
Spyro from Spyro Adventures
and of course Valerian Mengsk from Starcraft II
How the heck did I not realize this…?
. . . Garrosh is Scorpion from Mortal Kombat . . .
Yea but seriously it’s always interesting to see where some of these familiar voices might wind up . . . fel just look at Laura Bailey!
I read that the voice actor for Garrosh in Wrath was the same guy who played Oleg on Two Broke Girls. Always thought both roles would be more interesting if he reversed the two voices.
Grommash is Gantu from Lilo & Stitch
Among MANY others . . . Fel check out Jim C*mmings filmography (lore walker cho). You are guaranteed to have seen him in something else.
(It will not let me post his actual last name . . . what the fel)
Illidan is also War from Darksiders
the guy that controls him at this scene is also Luke Skywalker/Joker
Ooh he cute! The gnomes should be the ones who swoop in and free Andalin in 9.2, that would be so cute! Do it Blizz that’s so adorable 
Goulash is delicious. 
Didn’t know scorpion goulash was a thing.
Josh is great, super nice dude.
Did ya’ll know Josh Keaton has a cameo account?
And you can pay him to say things?
Illidan’s VA also voices Grimoire Weiss from NieR, Baine’s VA is also in there too as the main character as an adult (Papa NieR as some call him).
A lot of the voice actors work on a lot of different top selling titles. Sometimes they even shown up in a lot of animated shows or other projects. There are multiple actors / actresses that show up often in a lot of games I play. Take the actress for Jaina for example. She was the voice for one of the main companions for the Jedi Knight in swtor. She also took over for the demon huntress in Diablo 3 for the expansion.
Think about Mark Hamill. He is famous for playing Luke Skywalker and also famous for playing the voice of the Joker in a lot of the animation shows for Batman.
Also the actor Tony Amendola who plays Khadgar was in a recent game I played, Star Wars Jedi : Fallen Order. Some people who are fans of Stargate SG-1 will also recognize him from that show.