Boss Spearman — Open Range (2003)

Kevin Costner's elegiac Western gave Duvall one of his most beautifully underplayed late-career performances. As Boss Spearman — a cattle drover forced into a showdown against a corrupt rancher — Duvall embodied the dying spirit of the frontier with a weariness and dignity that felt like the last act of something enormous. At 72, he proved the great American actor had lost none of his power.