Lawman with Burt Lancaster and Lee J. Cobb.

Once Upon a Time in the West with Henry Fonda in a rare villain role, along with Claudia Cardinale, Charles Bronson and Jason Robards. The plot doesn't really matter, it's the imagery, scenery, and music that makes it a joy to watch. Being a Sergio film, there's not a lot of idle chit-chat.

The Lonesome Dove mini-series was very good, too.