There couldn't have been an actor more suited to the role of John Dutton on Yellowstone than Kevin Costner. And despite the ups and downs, the back and forth, the will-they-won't-they between him and the show's creator, Taylor Sheridan, Yellowstone turned out to be just the sort of hit that Costner needed at this stage of his career. The show's success gave him the confidence to mount his own Western epic, Horizon: An American Saga, which remains stalled after the underperformance of the first installment. He spent a considerable amount of his Yellowstone earnings on self-financing the epic Western series, not to mention the fact that he effectively gave up the chance to return for more seasons of the show by focusing on his own project. But Costner and the Western genre go hand-in-hand; some of the best and most underrated movies of his career are Westerns.