Planning to add all my showdown picks here. Currently:

1-10: To Be or Not to Be (Best Shakespeare film adaptations)
The Nice Guys (Best films about male friendship)
Grand Illusion (Best classic sci-fi/fantasy films)
This Must Be the Place (Best films with location titles)
The Killing Joke (best dark comedies)(I'm excluding horror comedies because I feel like that is a separate thing)

I'm starting to reuse so not every category has 10, see notes for details