Wow. George's mentioning "Paint Your Wagon" reminded me of some silly westerns like "The Apple Dumpling Gang" and "Blazing Saddles." Then I remembered the title of a comic western on TV all the time that my mom really loved: "Cat Ballou." I couldn't recall any of the plot, just a few vague scenes with Lee Marvin, so I looked it up and — Get out! — look at this description:
"A woman seeking revenge for her murdered father hires a famous gunman, but he's very different from what she expects. (He's a drunk!)"
Sound familiar? Only, this movie preceded "True Grit" by four years (1965) and Jane Fonda is shown on the movie poster WEARING PANTS.