I was thinking of Presidents the other day. If you start at Washington and go forward there are some incredible men of great intellect that held the office. If we start at Obama and go backwards it is amazing the country has survived. Going backwards I like Reagan but then i think you have to back to Coolidge to find the next great President.

The role and power of any US president should be minimized. We tend to put way too much emphasis on what our presidents can/should do for us. My two cents.

Calvin Coolidge is definitely in my top three.

OTOH, he supported the biggest danger to the Republic and whose primary goal has been to destroy the ability of people and government to live within its means.
From his State of the Union in 1926:
"It would be difficult to overestimate the service which the Federal reserve system has already rendered to the country. ...
Its business is to furnish adequate credit and currency facilities. This it has succeeded in doing, both during the war and in the more difficult period of deflation and readjustment which followed. It enables us to look to the future with confidence and to make plans far ahead, based on the belief that the Federal reserve system will exercise a steadying influence on credit conditions and thereby prevent tiny sudden or severe reactions from the period of prosperity which we are now enjoying. In order that these plans may go forward, action should be taken at the present session on the question of renewing the banks' charters and thereby insuring a continuation of the policies and present usefulness of the Federal reserve system."

I can't include anyone after the 1850s in my 'top ten'.