Do you really think Coolidge belongs on that list? I think he was the last President that tried to govern within the Constitution.
Yes, he was. But he also did nothing to promote the understanding of why - hell, he basically did absolutely nothing at all. That is just as detrimental as taking action in the opposing vein, in my opinion. His views were clear, and he was a true Constitutionalist - the last in the line of Presidents, but he helped it all go to hell in a handbasket by not taking action to preserve what he believed.