Your question is hard to answer because it is difficult to compare one of the Founding Fathers to more contemporary presidents.
But, I sense you are looking for specifics, so here goes.
My vote goes to Harry Truman
1. He was handed the task of succeeding the only president who had been elected to four consecutive terms. (FDR died shortly after being elected to the fourth term)
2. Through the Marshall Plan he rebuilt Europe more quickly than ever though possible.
3. Like it or not, he gave the order to drop the first Atomic bomb. Thousands were killed, but more would have died if the war had dragged on for two or thee more years.
4. He saw to it that the White House was repaired before it fell apart.
5. He removed Gen. McArthur from his command, before he had a chance to grab civilian authority.
6. He was a man of the people.
7. He fooled the pollsters and news media by winning re-election in his own right.
8. He shifted our economy from a wartime economy to a peacetime economy.
9. No scandals (to my knowledge) were associated with his administration.
10. He knew who was ultimately responsible for all the actions of his administration by proclaiming with a sign on his desk, "The Buck Stops Here."
Many presidents have done great things. Washington invented the presidency and kept it from becoming a regal position. Jefferson approved the Louisiana Purchase. Monroe announced that North America was no long open to colonization, FDR fought the Depression and WWII. Kennedy-Johnson gave us Medicare, the Peace Corps, Civil Rights Legislation and the push to send man to the moon.