Biography
Gervase Duan Spradlin (August 31, 1920 – July 24, 2011) was an American actor. Known for his distinctive accent and voice, he often played devious authority figures. Description above from the Wikipedia article G. D. Spradlin, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Known For

The Godfather Part II
Senator Pat Geary

Apocalypse Now
General Corman

Resting Place
Sam Jennings

Zabriskie Point
Lee's Associate

The War of the Roses
Harry Thurmont

Tora! Tora! Tora!
Cmdr. Maurice E. Curts (uncredited)

Canadian Bacon
R.J. Hacker

Tank
Sheriff Buelton

The Long Kiss Goodnight
President

Ed Wood
Reverend Lemon