Here are the Presidents who rated most strongly on psychopathic trends, as per a survey of Presidential biographers and historians. Note the inclusion of some of the Presidents rated best by historians (as well as GW Bush):

• Teddy Roosevelt
• John F. Kennedy
• Franklin Roosevelt
• Ronald Reagan
• Rutherford B. Hayes
• Zachary Taylor
• Bill Clinton
• Martin Van Buren
• Andrew Jackson
• George W. Bush

Some of our less-effective leaders were among the least strongly psychopathic: Jimmy Carter, Gerald Ford, George H.W. Bush.

‘Okay, so, what the hell? Here’s neuroscientist James Fallon.Why do we prefer leaders who are, as Fallon puts it, “world-champ liars, pathological liars, even for the hell of it?” Well, it turns out that they lie for us. We’re totally cool with someone being a psychopath as long as they’re our psychopath…’

Source: Big Think