
Paul Maxwell (born Maxim Popovich; November 12, 1921 – December 19, 1991) was a Canadian actor who worked mostly in British cinema and television, in which he was usually cast as American characters.
[biography (excerpted) from Wikipedia]

Aliens
1986 · as Van Leuwen

Indiana Jones and the Last Crusade
1989 · as Panama Hat

A Bridge Too Far
1977 · as Maj. Gen. Maxwell D. Taylor

The Haunting
1963 · as Bud Fredericks (uncredited)

The Pink Panther Strikes Again
1976 · as CIA Director

The Vision
1987 · as Bill Freed

It!
1967 · as Jim Perkins

Intrigue
1988 · as Esterbrook

Rustlers' Rhapsody
1985 · as Sheepherder No. 1

Man in the Middle
1964 · as Major Smith

The Looking Glass War
1970 · as CIA Man

Strong Medicine
1986 · as Mace

We Joined the Navy
1963 · as Commander Spelling U.S.N.

How to Make a Monster
1958 · as Jeffrey Clayton

Blood of Dracula
1957 · as Mike, assistant coroner

The Last Days of Patton
1986 · as Lt.Gen. Geoffrey Keyes

The Man Who Lived at the Ritz
1988 · as Mylos

Thunderbirds Are GO
1966 · as Captain Paul Travers (voice)