Russell Peters, Pablo Francisco, Dave Chappelle, Eddie Murphy
Right off the top of my head I'll have to say Lenny Bruce and the Great Robert Gustaffsson. Though if you don't have at least a slight grasp of Swedish he's hard to follow.
jim gaffigan, dave chappelle, mitch hedberg, lewis, attell. tons of good ones out there.
Dave Chappelle,Mike Epps,Dane Cook,and the blue collar guys