Franklin Roosevelt
You'll read on the Fount of All Knowledge that Oliver Wendell Holmes said Franklin Roosevelt had a second class intellect but a first class temperament. Of course, at the time Oliver had both a 92 year old intellect and temperament, but at least the statement made a good book title.
And you might be a bit suspicious about the quote. With the rise of the Internet and to paraphrase Mr. Yogi Berra, most people don't say all the things they said.
So to see if Oliver really paid this somewhat backhanded compliment to the man who - believe it or not - has the highest approval ratings of any US President, just click here.