Walrus is on the right path but that kind of determination needs more time. "Wizard" and "GWTW" were made almost 70 years ago. Their enduring popularity is tested. More recent films that would qualify include "Psycho", "Moonstruck" and "Singin' In The Rain".
Films like "Citizen Kane" and "Birth Of A Nation" were inovative and important but too esoteric to retain a sizable audience. They are more like such mileposts as "The Jazz Singer" and that train robbery movie where the guy shoots a gun at the camera.