Although federalist society isn't the most non-partsian group, this really is a good survey.
The Federalist Society » Publications - Rating the Presidents of the United States, 1789-2000: A Survey of Scholars in History, Political Science, and Law
(click the pdf file)
My problem with it--------
1)Woodrow Wilson is
still overrated in ranking(although at least they say that he is 'overrated').
2)Reagan should rank below Polk and IKE.
3) Andrew Jackson in top 7-----If you destroy the economy, break contracts and kill native american----you get ahead.
4) Ulysses Grant, harding and Coolidge are still underrated.
5) Jimmy Carter should be higher------
just a little higher.
James MacGregor Burns on Nixon,
"How can one evaluate such an idiosyncratic president, so brilliant and so morally lacking?"
So true.