I saw an old 1986 flick on Amazon Prime the other night I consider a hidden gem called At Close Range. If you've ever seen the Madonna video "Live to Tell" you've seen clips from that film. I always wanted to watch it but could never find it anywhere.
It's pretty intense! Kind of like a mafia story that takes place on the Pennsylvania countryside. Very dark and violent. It stars a young Christopher Walken (!), a younger Sean Penn, and even a younger Kiefer Sutherland.
If you have Prime you should check it out because it's free.