Welcome To Hard Times (1967)

In the town of Hard Times, a stranger rides in and terrorizes the small settlement. He kills a number of townsfolk, including Fee, the town's founder. Mayor Will Blue fails to stand up to the man, who rapes saloon whore Molly and burns down the town. Blue promises to rebuild the town after the stranger rides on, but the townsfolk give up and leave. A wagon load of prostitutes led by "entrepeneur" Zar shows up and together with Blue, they rebuild the town. But Molly's desire for revenge and her anger at Blue for not protecting her eat at her, and Blue promises that things will be different when the stranger returns. And return he does.

IMDb: https://www.imdb.com/title/tt0062482