If you watch any film on this list, make it World’s Greatest Dad. Written and directed by Bobcat Goldthwait, World’s Greatest Dad is supremely dark, and as I’m sure you could figure out, that the title is being sarcastic. But if you couldn’t figure it out (because really, I’m sure you could just imagine Robin Williams being in an unironic movie with that exact same title), just know that Robin Williams delivers a powerhouse performance. He experiences tragedy, and manages to turn that tragedy into selfish fame. Given the subject matter, I think this movie might have been especially hard on the actor to go through, but he smiles and jokes his way through it. Because that’s the kind of pro he was.