Ron Perlman (Perfect as the Narrator for every Fallout game so far, and it should stay that way)
Clint Eastwood
Bruce Willis
Bill Paxton
Hank Azaria
Frank Welker
Richard Dean Anderson (he's in the 1st game, so it's probably not a good idea, unless he can change his voice)
Mike Rowe
Mark Hamill
Steve Buscemi
Jason Statham
Mel Gibson
but then again I agree with this
I'd prefer a noname cast that does well for what it is set out to do. At the price of Liam Neeson - for example - you could get 3-4 professional voiceactors with no Hollywood fame, and thus far greater VO variety.