In response to the Film Experience Blog, my top 20 actors. This is a pretty arbitrary list, with some ridiculous picture choices:

Hugh Jackman
Clark Gable
Cary Grant
Tom Hanks
Harrison Ford
Robert Downey Jr.
Daniel Day-Lewis
Gene Kelly
Yul Brynner
Edward Norton
Steve McQueen
Anthony Hopkins
Takeshi Kaneshiro
Gregory Peck
Kenneth Branagh
Denzel Washington
Colin Firth
Joaquin Phoenix
Mark Ruffalo
Steve Zahn