For Jewish guy from Brooklyn, Wallach played basically the same Mexican bandit four times in "The Good, the Bad, and the Ugly," "The Magnificent Seven," "Ace High," and "Don't Turn the Other Cheek."
As for a movie, I'll go with "Silverado." It seldom drags and has a great ensemble cast: Kevin Kline, Kevin Costner, Danny Glover, Brian Dennehy, Jeff Goldblum, John Cleese, James Gannon, Linda Hunt, Jeff Fahey, and even a brief appearance by Sheb Wooley.
I'll thrown in any of the Sackett TV movies with two of the greatest mustaches in western history: Sam Elliot and Tom Selleck.