Larry Harmon didn't create Bozo the Clown, but he has become most associated with the character after acquiring the rights several years ago.
Harmon, taking his cue from Romper Room's creator, Bert Claster, franchised Bozo to stations around the country who could hire their own actors to play the "World's Most Famous Clown", whose longest stint in any one city is Chicago. Did my home district get a Bozo? Nope. However, the show was briefly revived in syndication and aired on WPIX in the 80's, complete with the original aniimated shorts from the 1958-62. For the cartoons, Harmon did the voice himself, and also produced the cartoons.
Harmon was one of several animators to also work on Popeye during the 60's, and his staff included future Filmation founders Lou Scheimer & Hal Sutherland. Right now, scope out "Square Shooting Square":
For some reason, Bozo didn't really translate well in animated form. Considering that he started in a series of Book & Record sets from Capitol Records, and voiced by Pinto Colvig (Goofy), it is a little strange.