This Saturday is All The Way documenting LBJ and starring Breaking Bad's Bryan Cranston if politics are your thing. I know there have been good ones in the past but I'd have to take a look to remember some.
Paradise Lost looks really grim. Don't know if I can handle that kind of heavy content. I remember reading about that case and it made me sick to my stomach.
How to Die in Oregon was phenomenal, won multiple awards, and happens to be directed by my boss's brother. I believe it's on HBO and an absolutely incredible film...but I'd still start with Cathouse.