I think you made a couple of mistakes in this. It was Nixon in 1972 that had a margin of 96.65%, not Jefferson (who still should be on the list with 92.05%). Also, Herbert Hoover (if he stays on your list) has an "r" in his first name.
How can Lyndon. B Johnson 'win' the presidency since he never actually won the presidency at all, but just became president after the Kennedy assassination?