For the big screen, I'm a fan of "The Wild Bunch" with William Holden, Robert Ryan, Ernest Borgnine and Warren Oates. It's a bit of an anti-Western, but the only guys with any honor or moral code are the outlaws. The Governments and the big banks are the real murderous thieves.
The Wild Bunch
The Outlaw Josie Wales
True Grit (Original Version)
My Little Chickadee
The Unforgiven
The Trap (Frontier Canada)
She Wore a Yellow Ribbon
Once upon a Time in the West
4: 10 to Yuma