Why is he forgotten?

https://www.reddit.com/r/movies/comments/sotez4/montgomery_clift_why_is_he_forgotten/

During his lifetime Montgomery Clift was considered the equal of his method acting contemporaries Marlon Brando and James Dean and yet both have completely eclipsed him in terms of fame. They are still well known and iconic today whereas Clift is mostly forgotten by the general public. It's ironic because Clift was actually the first of the method actors to make his film debut (before Brando and Dean) and he blew audiences away with his performance in The Search. It was a performance that felt real and believable and it was like nothing audiences had seen before. People actually thought Clift was a real soldier and they would go up to the director afterwards asking where he found a soldier who could act so good. Clift was one of only 6 actors in film history to receive a Best Actor academy award nomination for his screen debut.

He would continue to give excellent performances in A Place in the Sun and From Here to Eternity and in the 1950's was considered among the greatest film actors of his generation. Sadly Clift had personal problems and after surviving a terrible car accident those problems only got worse. He would continue to act, but by the 1960's his career wasn't going well and he died prematurely at 45 suffering a heart attack most likely brought on by years of drug and alcohol abuse.