Stephen Roberts(1917-1999)

He is probably the only actor to have played President Franklin D. Roosevelt in four different films and one mini-series (five times total), four of the roles were consecutive (one in 1978, in the mini-series in 1979, and two in 1980), the fifth was a non-consecutive movie in 1967, and with another, unrelated role (in 1972), consecutively before the four Roosevelt roles, where he was credited simply as "President," although that was most likely as a fictional, unrelated, non-Roosevelt president.