Prison films with a focus on yard politics?

Always an interesting genre for me and looking for more. I dont care if gore is a part of it, just as long as it isnt the focus. I recently watched Animal Factory and it is the perfect example of what I'm looking for. I've seen the classics like Shawshank, Green Mile, Escape from Alcatraz. I've also seen some that regularly get recommend here like Shot Caller, Felon, and the Harry Potter one (cant remember the name). I've tried watching Starred Up 3 times and its put me to sleep every time.