I picked 4 movies that commonly top "all time lists," but I wanna see what the GaG community thinks.
Note: Out of these four, I've only seen The Godfather (what a shame, I know, me being the self-proclaimed film buff). Even still, I doubt the other three are better than the masterpiece that is The Godfather.
(If you haven't seen or heard of any of these, please feel free to let me know what your favorite is). SERIOUS OPINIONS ONLY! I don't want to see you saying "Frozen is the best movie of all time."
I don't know that a movie can be really great in the way the work of a single mind like a book or an artwork can because it's a collaboration. I mean you could call a baseball team great but they aren't great the way a great work of art is.
There are many films I would rate above any of those. 'Bridge Over the River Kwai', 'The Cook the Thief his Wife and her Lover', 'Marat/Sade', 'Rashomon', et. & etc.