Don't forget Iran-Contra , it totally circumvented the constitution and he also really swelled the deficit. In recent times only Clinton reduced the deficit.
Best : Clinton Truman , JFK
Worst : Johnson , W , Reagan
Why Clinton or JFK?
Clinton was on his way to being a total disaster until the '94 midterm election gave him a Congress that balanced the budget. Other than that he did let the bad guys get away and even helped them gain strength by running from Somalia after we got our nose bloodied.
Other than the Bay of Pigs and the Cuban missile crisis all JFK did was cut taxes. He did get us deeper into Vietnam though. I am not sure I would call that a positive.