George Carlin, Bill Hicks and especially Lenny Bruce. They are probably who I look up to most in my life. It's unfortunate that Americans have no good comedians left. At all. For comedians that aren't dead, I do enjoy Sean Lock, Dara O Briain and Frankie Boyle. Apart from that, British humor seems to be dying out. All these fucking pathetic comedians like Lee Mack, Russell Howard, Michael McIntyre. They're all shit.
I agree, there arent that many good American comedians left, but i'm sure this generation will produce a few.
Well, George Carlin and George Lopez are my favourite, but Romulus already posted those two, so I'll have to say Jon Stewart.
Hmm.....Gabriel Iglesias... Daniel Tosh.... and the Blue Collar Comedy Tour guys (especially Ron White.)