21. Chris Rock
Rock always had a hard time getting on the air — there was a classic In Living Color sketch about Rock getting thrown out by NBC security who refuse to believe he's a cast member. But make no mistake: Even back then, Rock was hungrier and faster than anyone else. Whenever he got a sketch (barely once a month, usually in the final 15 minutes), he blew the rest of the episode away, with his militant Nat X ("What's the matter, Whitney — you can't get a black bodyguard?") or his B-boy Onski from "I'm Chillin'." Nobody in the history of the show inspired more Monday-morning "Who the hell was that guy?" conversations. If he never worked a day after SNL, we'd all still know his name.