Brando did a lot great stuff with Elia Kazan, but me I like James Dean better than Marlon for various reasons. The primary reason is that James Dean embodied the rock n’ roll culture - he changed cinema significantly with East Of Eden and Rebel Without A Cause, and if you look at Giant - James played Jett Rink, (a simple ranch caretaker that inherits a piece of land in a will, and strikes oil, and ultimately becomes one of the richest men in the US) you can see he was going to be one of the greatest actors in cinema - not that he isn’t now, but only god knows what other great work lied ahead of him. He was only 23 years old and he nailed the role! I won’t forget that last scene of him - in a large room, drunk off his ass and alone. Then he begins to whimper like a child. His character had a Citizen Kane aspect to him.