I can recommend one, SlyFoxHound [http://www.youtube.com/user/xXSlyFoxHoundXx]
He does videos on live gameplay, often recent games. Some CoD, a lot of Minecraft, currently a playthrough of inFamous 2 and mostly just random games. He is one of the only guys I know that truly does a good job at being hilarious while playing a video game. To top all that, he has by far one of the best small community's around him that I've come across.
Oh, wait one more, Igor Presnyakov [http://www.youtube.com/user/Iggypres] Does acoustic covers and is probably the best at what he does on You Tube.