Hint: One of the actors I'm thinking of later hoarded an Island and the other played a Batman villain.
Donald Sutherland and Charlton Heston were also considered for the role of Lewis, while Gene Hackman and Lee Marvin were considered for the role of Ed. Where did you hear that they'd thought about only Brando and Nicholson?
Jim Bloom Which actor who would later go on to be a part of two major movie franchises got his breakout role in American Graffiti?