As for our Mt. Rushmore of American actors, I must list:
Charlton Heston
Elizabeth Taylor
Audrey Hepburn
Bogart
George C. Scott
Bette Davis
Natalie Wood
Mel Gibson
Al Pacino
Robert DeNiro
James Stewart
Spencer Tracy
Barbara Stanwyck
Denzel Washington
Laurence Fishburne
Johnny Depp
Sandra Bullock
You should add:
Robert Duvall
Gregory Peck
Robert Mitchum
Tom Hanks
Jimmy Cagney
Marilyn Monroe
Ava Gardner