Who is this Harry Longabaugh fellow, you ask? Well he was the Sundance Kid!

If you are unfamiliar with the Sundance Kid, and his partner, Butch Cassidy, they were part of the Wild Bunch that pulled off the longest string of successful bank and train robberies in American history.

Why does he make the list of notable mustaches? While most outlaws don a mustache to hide their identities, truly great men such as Harry Longabaugh grow one to make sure their identity is every bit as memorable as it ought to be.

And with a ‘stache like that, can anyone say he wasn’t successful?