4. Robert Downey Jr.
Robert Downey Jr. has become best known over the last decade as Iron Man, one of everyone’s favorite Avengers in the Marvel Cinematic Universe. Before that, he was in a several of ’80s teen movies, he was a “Saturday Night Live” cast member, and he earned himself an Oscar nomination for his work in the 1992 movie “Chaplin.” But his life hasn’t always been so successful. His current accomplishments have led many fans to forget RDJ’s struggles and scandals in the ’90s, a time when he seemed totally washed up…