Folklore Americana
Our main Fantasy Trip artist, Rick Hershey, is also an indie publisher as Kids in the Attic. Rick has a BackerKit campaign going on right now for a roleplaying project, Folklore Americana. It looks very interesting. To quote . . . "a folk horror TTRPG set in the shadows of the Great Depression, where dead crops whisper secrets, folk heroes fade into myth, and the Devil himself rides the rails. Powered by a custom take on the Year Zero Engine." It's already made its goal, and you've got a couple of weeks to check it out and support. At the base level, you not only get a (more or less) 300-page rulebook, but also a 100-page sourcebook specifically for Session Zero.
This immediately brought to my mind the "John the Balladeer" stories by Manly Wade Wellman. John (we never learn his last name) roams the mountains armed with his silver-stringed guitar, his knowledge of hidden lore, and his willingness to face any sort of evil to help the people around him. The period is later than the game's setting; John was a Korean War veteran. But some things don't change.