Question: what actor has been in the most american movies?
Answer: Christopher Lee (+280 acting credits)
Robert Loggia (+225 acting credits) ... 
James Earl Jones (+188 acting credits) ... 
Louis Gossett Jr. (+177 acting credits) ... 
Donald Sutherland (+176 acting credits) ... 
Michael Caine (+161 acting credits) ... 
Danny Glover (+161 acting credits) ... 
Samuel L. Jackson (+158 acting credits) ...