In this order & off the top of my head…
Geza Rohrig in Son of Saul (‘15)
Robert Duvall in To Kill A Mockingbird (‘62)
Clint Eastwood in A Fistful of Dollars (‘64)
Holly Hunter in The Piano (93)
Ryan Gosling in Drive (‘11)
Andy Serkis in Rise of the Planet of the Apes (‘11)
Jackie Gleason in Gigot (‘62)
Bart the Bear in The Bear (‘88)
DISQUALIFIED:
Sandra Bullock in Gravity (‘13), due to shouting “Aagghh! Aagghh!” too many times.
Tom Hanks during the island survival portions of Cast Away (‘00), due to yelling “Wilson!” too many tunes..