Dane Cook, Steven Wright, Jim Gaffigan, Mitch Hedberg, Louis C.K., Ron White, Bill Engvall, Emo Phillips, and Steve Martin are all good, but my two favorites of all time are Eddie Izzard and Patton Oswalt.
I don't know why people like Dane Cook. He's been caught for plagiarism so many times and his jokes make no sense. He runs around on stage like a maniac and says the most random stuff. However, I watched "ISolated INcident" and it was pretty good, but, because he stole jokes from other comedians, I don't really respect him that much.
With that being said, hands down, Dave Chappelle, Zack Galifinakis, and Kyle Cease are my favorite comedians.
Lewis Black, Gabriel Iglesias, Jim Gaffigan, Sebastian Meniscalo, Pablo Fransisco, Frank Caliendo, Aries Spears, Kyle Grooms, Corey Holcombe, George Carlin, Daniel Tosh, and Demetri Martin. Why bold him? Because he is one of the funnier comedians out there right now.