The Shining
I feel like this movie has more iconic scenes and imagery than any other ever. There is the blood elevators, the hedge maze, here's Johnny, Redrum, the creepy twins, the tricycle, the all work and no play typewriter, the opening credits over the mountains, the damn carpet, the blowjob bear, basically every set in the movie and I'm sure I'm still missing a lot more. Does any other movie have this sheer amount of things in it that are so immediately recognisable and commonly parodied? I bet people who have never seen this movie have basically seen half if it through pop culture.