Harpo Marx
Arthur Adolph "Harpo" Marx (November 23, 1888 – September 28, 1964) was an American comedian and film star. He was the second oldest of the Marx Brothers. His comic style was influenced by clown and pantomime traditions. He wore a curly reddish wig, and never spoke during performances (he blew a horn or whistled to communicate). Marx frequently used props such as a walking stick with a built-in bulb horn, and he played the harp in most of his films. Description above from the Wikipedia article Harpo Marx, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Filmography
I Love Lucy
The Colgate Comedy Hour
The Dinah Shore Chevy Show
The Ed Sullivan Show
DuPont Show of the Month
The DuPont Show with June Allyson
General Electric Theater
A Night at the Opera
Love Happy
The Big Store
Horse Feathers
A Day at the Races
The Movie Orgy
Duck Soup
Hollywood Out-takes and Rare Footage
Room Service
Oops, Those Hollywood Bloopers!
The Story of Mankind
Stage Door Canteen
Hollywood: The Dream Factory
Go West
The Cocoanuts
No Image
America After Dark
A Night in Casablanca
Brother, Can You Spare a Dime?
The Big Parade of Comedy
The Unknown Marx Brothers
That's Entertainment, Part II
Dalí & Disney: A Date with Destino
At the Circus