If you loved Once Upon a Time... in Hollywood, try Jackie Brown
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Quentin Tarantino, and they both carry the bittersweet mood tag, and they sit in Drama / Thriller territory. If that's the register that drew you to Once Upon a Time... in Hollywood, the second film will land in a comparable space — through a different lens.
bittersweet
What Jackie Brown is
Los Angeles, warm winter evening, a flight attendant's luggage. A gunrunner's cash, a bail bondsman's help, a plan to double-cross. Tarantino grounds his crime story in character nuance.

