Who were Buster Keaton, Harold Lloyd and Charlie Chaplin?

Charlie Chaplin, Harold Lloyd and Buster Keaton were two of the most well known comedians in the silent film era, but their styles were drastically different. 

Examples of some films they made

The Kid ,1921, Charlie Chaplin

The General, 1926, Buster Keaton

Girl Shy, 1925, Harold Lloyd

Film makers they influenced

Jacques Tati was a French mime, filmmaker, actor, and screenwriter.