Funnily enough, I was not reading about Sheb Wooley specifically when I found out that he was the voice of the Wilhelm Scream sound effect. He even did alternative screams in the same recording session (audio is on the Wikipedia page).
Hoosiers (1986). A coach with a checkered past and a local drunk train a small-town high school basketball team to become a top contender for the state championship in 1950s Indiana.