Of what’s been mentioned;
Godfather part 2 or 3
Gone With The Wind
I’m mainly a fan of animation and adventure films, not many classics from those genres which elude me. Persopolis is the only notable one I can think of, and that’s relatively recent.
I do have a gaping hole in that I’ve never seen any of Akira Kurosawa’s films, need to rectify that.
Star Trek is unknown to me beyond JJ’s reboot. People who know me well are always really surprised to learn that, probably it’s more of a cultural thing than just films. Don’t know why it’s a shock to anybody though, I was born in 1992 so pretty much nobody of my generation grew up watching Star Trek, it was massively on the wane and Star Wars was massive. I don’t know any Trekkies under 30.