Peter Lorre, Johnny Weismuller, John Huston, Richard Pryor, Burt Lancaster, Harold Lloyd, Bill Hicks, Boris Karloff, Alec Guiness, Lon Chaney Jr, Marty Feldman, Roy Kinnear and Orson Welles.
And two of the people very fortunate he hasn't been around for the past couple of years are Blair and Dubya. They would have been crucified for their antics.
Good shout. When he 'replaced' Grandad a lot of people were saying things wouldn't be the same, but I think he was great for the show in his own right.