While it's tough to compare two legends, a case could be made that Buster Keaton was a greater filmmaker than Charlie Chaplin. Keaton's groundbreaking visual comedy and stunt work are often cited as his standout qualities, alongside his knack for incorporating complex machinery into his films. Chaplin, though a master of physical comedy and emotional storytelling, did not push technical boundaries in the same way. That said, the debate is subjective, and both filmmakers left an indelible mark on the world of cinema. It ultimately depends on personal taste and preferences.