Who was/is the "James Dean" of other decades?

If I had to pick one celebrity who was the symbol of the 1950s it would be Elvis Presley. Others on the short list would be James Dean and Marilyn Monroe.

'40’s - John Garfield anti-hero in most roles, great actor, died relatively young

Rather than starting a Happy Birthday thread I’ll just mention that James Dean would have been 82 tomorrow (Feb/8).