Named Buster as a child by family friend Harry Houdini after witnessing the boy fall down a flight of stairs, Keaton went on to do some of the most physical and dangerous comedy in motion pictures. Jackie Chan has often sited Keaton as his hero and inspiration. Chuck Jones liberally took from Keaton to base his animated films.
You can find many of Keaton's films available on YouTube. Buster wrote, directed and starred in many of his films and developed technical innovations that are still being used today.