Robert De Niro. One of, if not the, greatest actors of all time. Has had a leading or big role in some of the greatest movies of all time:
A Young Vito Corleone in the Godfather Part 2.
Travis Bickle in the Taxi Driver.
Michael Vronsky in the Deer Hunter.
Jimmy Conway in Goodfellas.
Al Capone in the Untouchables.
Jack Byrnes in Meet the Parents and Meet the Fockers.
Louis Gara in Jackie Brown.
And of course, Jake LaMotta in Raging Bull.