One-Eyed Jacks is a 1961 Western directed by and starring Marlon Brando. This is the only film Brando directed. The film also stars Karl Malden, Katy Jurado, Ben Johnson and Slim Pickens. This is long, but I like it except for the ending. It feels to me like it just quits without any satisfying resolution.
Watch it online:
The New York Times describes it as "an extraordinary sort of Western film". Reviews are hard to come by, which surprises me considering the people involved.