I fail to understand how he has a 66.7% favorability rating according to this poll.
Contrarianism. Most scholars and historians look very favourably on Wilson and disfavourably on the gop presidents of the 20s so this forum has decided to adopt the opposite view for some reason
Presumably the same scholars like the New Deal, to them FDR is a hero, they generally like LBJ except for Vietnam, love Lincoln blindly, and plump for Alexander Hamilton. They love the idea of spreading Democracy around the world, multinational organizations, global humanitarianism, etc. Most of these people are ardent fans now of the Washington Post and NY Times. If they are Republican they are compassionate conservatives in the Dubya mold or idolize Eisenhower, if they are Dems they are for the most part big time supporters of BHO or HRC.
Coolidge was very widely regarded by the public at the time in polling. Most of the academics are tied to the university system and thus have incentives to support the Conventional Wisdom.
Hoover is wrongly associated with laissez faire but his policies were nothing of the sort. He's not a good president in my mind at all.
There is a widely held belief that the Depression ended with the onset of WWII. While GDP showed an increase greater than any in history the on the ground truth was that people's spending was limited, rationing was enforced, and standards of living were low till the end of the war.
For many in this political mold, the wartime presidents of the major wars at least till Korea generally fare well in the public eye as they are given a wide berth in any freedoms they curtailed in order to allow the Americans to prevail in battle.