Most popular film on Letterboxd I haven't seen, per decade: 20: Saltburn 10: Joker 00: Coraline 90: Princess Mononoke 80: Grave of the Fireflies 70: Stalker 60: The Sound of Music 50: Alice in Wonderland (Disney) 40: Bambi 30: Dracula 20: Häxan 10: Intolerance
Some pretty great ones you're missing there. I'd recommend Princess Mononoke and Stalker.
Yeah, at least 4 of these are movies I fully intend to see at some point — Mononoke and Stalker, also Dracula and Häxan. Most others I'd be fine with seeing, and just haven't made it a priority.