Unforgiven is another one for me as well - Hackman was good as Lil' Bill. Sergio Leone's spaghetti western trilogy with Eastwood also keeps me coming back for more; not so much for the acting or storytelling, but for Leone's campy, artistic style and scene composition. "For a Few Dollars More" is possibly my most watched movie of all time - Lee Van Cleef is a badass as Colonel Mortimer and almost every still frame in that damn movie could be framed as an art quality print. Next time you get a chance to watch it, look beyond the goofy acting and out of synch voice-overs and look at the brilliant use of facial expressions and meticulous, painter-like composition of light, shadow and arrangement in almost every scene. Use the pause button a few times and you'll get stills you could frame and hang on your wall.
While we're talking about westerns, the two more recent Wyatt Earp movies were not bad; with Val Kilmer stealing the show as Doc Holliday in "Tombstone."
Ah'm yoh huckleberry
Another Gene Hackman western performance I got a kick out of was John Herod in "The Quick and the Dead" with Sharon Stone. His role saved that movie for me.