"Watching Rock in 2004, 21 years into his comedy career, is like watching a great prize fighter in peak condition," the magazine said.
Rock, 38, currently is on the road with his act, which will culminate in an HBO special.
David Letterman barely missed making the Top 10 list, as the veteran talk show host ranked No. 11.
Jay Leno, however, did not make the list at all.