Hmmmm quite apart from the fact that Teddy Roosevelt isn’t one of the four best presidents…
Truman has much in his favor, as pointed out above, and especially in light of the fact that he wasn’t even expected to run the country when picked as the stooge to ride along with FDR for four years.
As for others, well, frankly there are a few “competent-plus” presidents (James Monroe, author of the Doctrine that helped us keep European Powers from meddling too much in the Western Hemisphere; Teddy Roosevelt, father of the expanded National Park system; Grover Cleveland, etc.). But most of the rest fall into one of three categories: The Bland, The Truly Bad, or the Idealists.
Now the Bland are legion. By my count, and many will dispute this, the following presidents fall into this segment: Adams, Madison, Adams, Van Buren, Polk, Taylor, Fillmore, Pierce, Buchanan, Johnson, Hayes, Arthur, Harrison, McKinley, Taft, Harding, Coolidge, Hoover, Eisenhower, Johnson, Ford. Probably, history will judge Reagan and Bush into that category, along with the incumbent. Bland presidents are men who did little in office, either because no bold crises presented themselves, or because they simply allowed the issues to resolve themselves without showing much leadership or initiative. Buchanan can be taken as a prime example: his attempt to ‘Save the Union’ (his campaign rally cry) was very like the attempts of Chamberlain to keep the peace in Europe in the late 1930’s, when what was needed was the more direct approach of a leader and visionary (e.g.: Lincoln). Mind you, a Bland can be an okay thing, but a Bland can also cost us a lot.
Truly Bad presidents can be that way for a variety of reasons. Nixon was Truly Bad, NOT because of Vietnam, or Wage and Price controls, but because of Watergate and his response to it, which tore a huge hole in the nation’s confidence in the Presidency and federal government in general. U. S. Grant was a Truly Bad president because he was a drunken sot who let himself be lead around by the nose by his patrons. Truly Bad presidents, you will notice, come with truly bad advisors, a fact one should pay attention to at election times.
This leaves Idealists. Now the trouble with Idealists is that they are either Very Bad or Very Good, depending on your viewpoint. This makes it tough to judge them as to how good they were as a president. Andrew Jackson was an Idealist. He strongly believed in a new type of ‘democracy’ (see the heated debate over THAT word in another thread), one involving the common man, empowered to become whatever he could be. Jackson’s views on money were very strong and whether he was right or wrong depends on your views of federal government and its involvement in private economics. Woodrow Wilson was an Idealist, who either saved us from protracted involvement in WWI or kept us from putting a proper end to it much earlier, depending on your view.
Franklin Delano Roosevelt has had more impact on our country than any president since Abraham Lincoln. Whether he is a ‘great’ president depends on your view, because he was an Idealist. If you believe that the first and foremost purpose of a central government is to respond to social and economic ills (as well as military needs), then Roosevelt was the greatest president, for his legacy is Big Government, and the security of knowing that we will never just let an economy slide into ruin without trying to do something about it again. If you believe that the Feds should stick to Defense and roads, and as little else as possible, letting states solve their individual difficulties in a local and specific way, Roosevelt was an awful president, singlehandedly managing to saddle the union with the most expensive (and as yet, unpaid for) social and economic programs ever created in this country. One can, I suppose, make a cogent argument that his approach to WWII makes him a great leader, (and PLEASE, lend-lease did NOT save Britain, the RAF did), but great presidents are not the ones who won wars, but who did MORE than that.
All of which goes to show that in this, as in any other ranking, there is no way to objectify the issue. 