A list of actors who were either nominated a certain year or overlooked for their work that should've won an Academy Award.
If someone on here has an Oscar for a certain year, and I haven't added anyone else in that catagorey that year, then I personally feel they deserved the win.
http://www.ranker.com/list/actors-that-should-and-_39_ve-won-academy-awards/sharks0516,
Alec Guinness
Best Actor in a Supporting Role: Star Wars (1977)
Al Pacino
Best Actor in a Leading Role: The Godfather (1972), Serpico (1973), The Godfather Part II (1974), Scarface (1983) & The Godfather Part III (1990)
Christian Bale
Best Actor in a Leading Role: The Machinist (2004), The Dark Knight (2008) & American Hustle (2013)
Ewan McGregor
Best Actor in a Leading Role: Trainspotting (1996)
Best Actor in a Supporting Role: Black Hawk Down (2001) & Star Wars Episode III: Revenge of the Sith (2005)
Gary Oldman
Best Actor in a Leading Role: Sid and Nancy (1986) & Tinker Tailor Soldier Spy (2011)
Best Actor in a Supporting Role: JFK (1991)
James Stewart
Best Actor in a Leading Role: Mr. Smith Goes to Washington (1939) & It's a Wonderful Life (1946)
Peter O'Toole
Best Actor in a Leading Role: Lawrence of Arabia (1962) & The Lion in Winter (1968)
Peter Sellers
Best Actor in a Leading Role: Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb
Robert De Niro
Best Actor in a Leading Role: Taxi Driver (1976) & The Deer Hunter (1978)
Tim Roth
Best Actor in a Supporting Role: Reservoir Dogs (1992) & Rob Roy (1995)