George Washington. 1st POTUS. 1789-1797. Virginian. No Party Affiliation.
George Washington was unanimously elected by the ELECTORAL COLLEGE twice in 1789 and 1792. Never again has this been repeated, but it has come near unanimous first with James Monroe in 1820 (the closest), Franklin D. Roosevelt in 1936 (not far behind), and Ronald Reagan in 1984 (ditto and the most recent).
President James Monroe was reelected to a second term in 1820, unopposed in the "Era of Good Feelings." Monroe would receive 98.3% of the Electoral College votes, 3 members would not end up voting and one unfaithful elector cast a vote for Secretary of State John Quincy Adams because he felt he'd be a better president than Monroe.
In 1984, President Ronald Reagan won 59% of the popular vote and 97.6% of the Electoral College, that's everything except his opponent former Vice President Walter F. Mondale's home State of Minnesota and the District of Columbia.