Paul Benedict (September 17, 1938 – December 1, 2008) was an American actor who made numerous appearances in television and movies beginning in the 1960s. He was known for his roles as The Number Painter on the popular PBS children's show Sesame Street, and as the quirky English neighbor "Harry Bentley" on the CBS sitcom The Jeffersons. Often mistakenly credited as Charlie Bucket's school teacher (the uncredited role of Mr. Turkentine), in the cult classic Willy Wonka & The Chocolate Factory, who was actually played by David Battley.
Description above from the Wikipedia article Paul Benedict, licensed under CC-BY-SA, full list of contributors on Wikipedia.
The Mad Painter
Mr. Elinoff
Friedrich Hoffman
Hoakie (segment "Song of the Younger World")
Beaks
Harry Bentley
Jeremy
Kauldor
Mr. Ludlow
Harry Bentley
Walter Krasna (uncredited)
Judge Womack
Tucker 'Smitty' Brown
Finance Teacher
Night Shift Guard
Reverend Lindquist
Arbuthnot
Brownlee
Butler
Martin Berg
Mark
Arthur Fleeber
Plunkett
Not Guffman
Dr. Zook (voice) (uncredited)
Fairchild
Ben Lockston
Telegraph Man
Orren Brooks
Dr. Beineke
Dr. Plotner
Lester Traube
Chestnut Man
Zen Buddhist
Hitchhiker
Dr. Victor Loeb
Shots O'Toole
Magleby
Prof. Brainiac
Warden Edward Dwyer
Milo
Guido Fantoccini
Mickey
Wells Fargo Ferguson
Malcolm Maltved
Self
Cosmo
Rutherford Melon
Owner