Ulysses S. Grant, 18th President of the United States
The most famous image of Grant in a classic film is in the Cinerama epic How the West Was Won (1962). Grant is seen in the segment directed by John Ford and starring John Wayne. He is played by Harry Morgan.
The next one is from They Died with Their Boots On (1941) starring Errol Flynn as Gen. Custer and Olivia de Havilland as his wife. Grant is played by Joseph Crehan (uncredited).
Crehan portrayed Grant 9 times: Union Pacific (1939) - pictured below, Geronimo (1939), Colorado (1940), The Adventures of Mark Twain (1944), Silver River (1948), Red Desert (1949), San Antone (1953), and an episode of Jane Wyman Presents (1958).
In another John Wayne Film, The Horse Soldiers (1959), Grant is played by Stan Jones.
See a list of all the films with Gen. Grant in them here.
All images found via Google Images.