Donald Mounger Collier was an American actor best known for Western films and NBC television shows such as The High Chaparral, Bonanza, Gunsmoke, and Outlaws as Marshal Will Foreman. Wikipedia
5 Card Stud
Rowan
The War Wagon
Shack
The Cellar
Sheriff
Gunsmoke: To the Last Man
Sheriff Tom, Tombstone
Gunsmoke: One Man's Justice
Sheriff at Dillion Ranch
No Name and Dynamite
Angus
Incident at Phantom Hill
Drum
Twelve Hours to Kill
Andy
Safe at Home!
Ken Lawton
Paradise, Hawaiian Style
Andy Lowell
Once Upon a Texas Train
Warden
The Undefeated
Goodyear
Kate Bliss and the Ticker Tape Kid
Tim
Seven Ways from Sundown
Duncan
The Last Ride of the Dalton Gang
Frank Dalton
El Diablo
Jake
Bill Tilghman and the Outlaws
El Dorado
Deputy Joe Braddock
Tombstone
High Roller
Mr. Horn
Mr. Nickell
Living a Lie
Sheriff
Telling Secrets
Sgt. Barnett
September Gun
Sheriff Mills
Key West
Chief Jim Miller
Benefit of the Doubt
Charlie