I would have gone with The Hateful Eight if I didn't need to go at least nine deep... District 9? There was a movie just called Nine, steampunk & good. Nah.. Knives Out and Once Upon a Time in Hollywood had potential.. Uncut Gems, but I don't have KG.. I'm going to go with True Grit (2010). Awesome movie, very true to the book. Book is less than 200 pages, and a great read, fyi. I bought it for $0.10 at the used bookstore. I've never even seen the John Wayne version.
True Grit (2010)