perfidy

In chronological order: 

• Washington
• Jefferson
• Lincoln
• Theodore Roosevelt
• Franklin Delano Roosevelt 

I only relucantly put Jefferson up here, and would almost swap Adams in his place. However, Adams earns giant demerits for the Alien & Sedition Acts, which totally trump Jefferson's shortcomings. Reagan would make my top five, because his effect on the nation and the world was enormous. But as Mike points out, he has a formidible downside as well. 

All in all, a good group. Lincoln had that unfortunate prog-rock phase after his chart success, Jefferson had heroin problems late in his career (not to mention that awful on-stage meltdown in Mannheim), and it took Teddy three or four albums to find his sound, but in the end you just don't get better than these five here.