Movies are hugely subjective experiences, with everybody having different films they love for different reasons. So any supercut of the best closing moments in cinema is going to be just as subjective, with no real definitive list possible.
Still Cinefix is giving it a go with their countdown of the best closing shots in cinema history.
Yep Fight Club has an amazing ending and there are some fabulous final moments in the rest of this rather academically inclined list - who doesn't like a bit of intergalactic mystery from a master like Kubrick? And it ends up with Casablanca which is pretty fitting.