"Sherlock Junior" is an awesome silent movie. I enjoy Buster Keaton movies more then Chaplin, but that is just me.
As for older movies, I like the Hitchcock stuff. Obviously "Vertigo", Kim Novak YOWZAS, and "Psycho" are up there along with "Stranger on A Train" and "North by Northwest." Then others like "Easy Rider", "The Graduate", and "The Maltese Falcon."
There are other movies from back in the day I did not like at all that others adore. Like "Midnight Cowboy."
That is what is so great about movies, everyone has their own opinions.