[Shaun]

Who are they?

For me,

Actors:
Sean Penn
Tom Hanks
Marlon Brando
Jeff Bridges
John Malkovich
James Dean
Samuel L. Jackson
Liam Neeson
Gary Oldman
Brad Pitt [well, some of him. Fight Club/Babel/Benjamin Button]

Actresses:
Grace Kelly
Natalie Portman
Vivien Leigh
Meryl Streep
Laura Linney
Julianne Moore
Cameron Diaz [some. Being John Malkovich and The Mask...for aesthetic purposes]
Thandie Newton [in Crash she's outstanding]
Uma Thurman

Comedy actors:
Leslie Nielsen
Will Ferrell
Robin Williams