Believe it or else, Ernie Kovacs and Buster Keaton worked on a project together.  It was a sit-com pilot, filmed in just 3 days because it was pre-sold, and a first episode needed to be shot quickly. The show was called Medicine Man, and was a western about an itinerant snake-oil salesman (Kovacs) and his mute Indian sidekick (Buster Keaton). Both Kovacs and Keaton made the show solely for financial reasons.

I've seen the pilot, and it's hard to enjoy, although it played well with an audience when it was screened at the annual Buster Keaton Conference in Iola, KS a few years ago. The show is extremely formulaic and predictable and the laugh-track is blatantly obvious, moreso to me because the formula, canned laughter and western format are the complete opposite of what Ernie Kovacs was all about.

According to Valerie Allen, who played a sharp-shooter and potential love interest for Ernie's character, Ernie was thrilled to be working with Buster and talked with him between takes.  Edie said, on the other hand, that Ernie was busy writing, and had his typewriter brought to his dressing room so he could continue to work on other projects.

In any event, if the series had continued, it's possible that Keaton and Kovacs would have found ways to make room for more sight gags and physical business, the way Keaton always did in other television work.