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3. Robert De Niro
Regarded as one of the greatest films ever, “Raging Bull” portrays the life of former middleweight boxer Jake LaMotta and his turbulent personal life. De Niro took on the role of the troubled fighter and not only trained as a boxer for a part of the movie, but he also had to put on weight for the scenes set later in LaMotta’s life. Every actor on this list was nominated for an Oscar, but De Niro was the only one to take home the trophy.