El Dorado (1966)

In this classic Western directed by Howard Hawks and starring the duo of John Wayne and Robert Mitchum, the experienced gunslinger Cole Thornton resigns from a job when he discovers it involves facing an old friend. Soon, he learns that the town's most formidable gunslinger has taken on the task he refused. Navigating this moral dilemma, he joins forces with Sheriff J.P. Hara, an experienced Indian fighter, and a cunning gambler, resulting in a humorous and pivotal classic of the Wild West.