Richard Dysart
Richard Allen Dysart (March 30, 1929 – April 5, 2015) was an American actor. He is best known for his role as senior partner Leland McKenzie in the television series L.A. Law (1986–1994), for which he won a 1992 Primetime Emmy Award as Outstanding Supporting Actor in a Drama Series after four consecutive nominations. In film, he held supporting roles in The Hospital (1971), Being There (1979), The Thing (1982), Mask (1985), Pale Rider (1985) and Wall Street (1987). Description above from the Wikipedia article Richard Dysart, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Filmography
Columbo
Batman: The Animated Series
L.A. Law
Cannon
The Defenders
All in the Family
Baretta
The Thing
Maude
No Image
CBS Playhouse
Doctors' Hospital
Spawn
Back to the Future Part III
The Andros Targets
Hallmark Hall of Fame
Wall Street
Mask
No Image
Doc
Lincoln
Gemini Man
Hard Rain
Pale Rider
E! True Hollywood Story
Panther
Petulia
Being There
Meteor
Blood & Orchids
Truman
The Day of the Locust