buster Keaton Charlie Chaplin and harold lloyd were all Hollywood stars and directors, who were famous for their comedy films, they were influential because they all did things dramatically, and innovated ways to perform with silent films
some examples of films they made were “The Great Dictator” by charlie chaplin, it was a propaganda film during ww2 used to mock hitler.
another example is saftey last! starring hard lloyd, it was influencial for the risky stunt done by harold in which was extremely risky.
an example of a buster keaton film is the general, a film about the civil war.