He was one of the great character actors in Hollywood. He played a perfect general and politician. Seriously. When I first saw him in Apocalypse Now, I thought he was a former military officer.
It was nice to see that AICN posted a piece about your uncle.He was just Uncle Duan to me (technically he was my Great Uncle).
He was a character actor, I'm sure you guys have seen him.
Here are a few notable roles:
The Godfather II - Senator Pat Geary
Apocalypse Now - General Corman
The Greatest American Hero- Nelson Corey
The War of the Roses - Harry Thurmont
Ed Wood - Reverend Lemon
His IMDB Page
G.D. Spradlin - IMDb
I'll miss you Uncle Duan.