BraveStarr: The Movie (1988)

Also known as BraveStarr: The Legend, the feature-length outing is a prequel to the TV Series but came out after its cancellation. It tells how the Galactic Marshall with the mystic powers ended up on New Texas, and how his arch-enemy, Tex Hex, gained his own powers.
Most characters are Western stock types, but there's a love interest for the hero that's handled atypically for a kid's cartoon of this ilk.
The voices are well-suited and the animation quality is better than might be expected given the history of Filmation. It's damn exciting and if it had more interesting villains, then it'd likely be even better.

3½ toy guns out of 5