Keith David
Some known him as King from Platoon. Others know him as Goliath from Gargoyles, Captain Anderson in Mass Effect, Adventure Time’s Flame King, or Julius in Saints Row. Halo fans know him best as Elite warrior the Arbiter, and after sitting a few entries out, he makes a welcome return in 343’s second official game. On screen, you can see him on Community as Elroy Patashnik. Oh, and you can watch him on Rick and Morty as the POTUS and a Reverse Giraffe.
Brian T. Delaney
Delaney doesn’t just voice the Infinity AI Roland for Halo. In just a few weeks, he’ll be in Fallout 4 as the Male version of the protagonist, and earlier this year, he voiced Wreck-It Ralph for Disney Infinity. He had a recurring role in multiple sketches on the Tonight Show with Jay Leno, and done additional voice work for games such as Evolve, Titanfall, and Battlefield Hardline.
Dan Donohue
Donohue played Rafael in the series In Gayle We Trust, but some probably know him best from Skyrim’s Dragonborn DLC as Teldryn Sero and Mordin Veleth. In Halo 5, he voices the Warden Eternal, and he is definitely someone you don’t want to mess with.
Steve Downes (C’mon, of course he’s in Halo 5)
Downes has voiced Master Chief in every game with the Spartan, and that’s not changing at all with Halo 5. He played himself in a documentary about the convention cycle, and voiced Star-Lord in an episode of Avengers: Earth’s Mightiest Heroes.
Nathan Fillion
Dude, c’mon. It’s Nathan Fillion. He’s Castle, he’s Mal Reynolds, he’s been the Green Lantern. He’s Cayde-6, aka the Best Destiny Character Ever. He’s back in the role that introduced him to the Halo universe, and he’s never been used better as Buck. Even if his video game counterpart is slightly more handsome.
