Face it. Wayne’s Western reign ended in the seventies, leaving behind some big cowboy boots to fill. Enter two stars with guns blazing: Clint Eastwood is the quintessential anti-hero (Pale Rider, Two Mules for Sister Sara, Unforgiven). Robert Duvall sticks to the genre but has a broader range (True Grit, Lawman, Lonesome Dove). So who’s the greatest modern cowboy? It’s time for a showdown.