Zeppo Marx

Herbert Manfred "Zeppo" Marx (February 25, 1901 – November 30, 1979) was an American film star, theatrical agent and businessman. He was the youngest of the five Marx Brothers. He appeared in the first five Marx Brothers films, but then left the act to start his second career as a theatrical agent. Description above from the Wikipedia article Zeppo Marx, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Cast

Duck Soup
Bob Roland

The Movie Orgy
Self (archive footage)

The Cocoanuts
Jamison

Monkey Business
Zeppo

Horse Feathers
Frank Wagstaff

Animal Crackers
Horatio Jamison

A Kiss in the Dark
(as Herbert Marx)

I'll Say She Is
Sammy Brown

Oops, Those Hollywood Bloopers!
Self (archive footage)

The House That Shadows Built
Sammy Brown

Hollywood on Parade No. B-5
Self (archive footage) (uncredited)

The Marx Brothers: Hollywood's Kings of Chaos
Self (archive footage)

Inside the Marx Brothers
Self (archive footage)

Humor Risk
Playboy / Barowner

Classic Comedy Teams
Self (archive footage)