Anything shot in 70mm will probably near the top.
2001 and Bladerunner are my two choices of the 2 best movies i have in 4k. Bladerunner in particular is jaw dropping. I hear BR 2049 is pretty amazing too but i haven't got that yet
I've got 2001 and 2049 to watch over the Christmas holidays in 4k. Hoping they are as good as people say.