Good research work by a fine institution:
OBAMA RATED 5th BEST PRESIDENT IN OUR HISTORY
From a total of 44 US Presidents: Obama is rated as the 5th best. The A&M's Public Relations Office released this statement "After only 5 years in office, Americans have rated President Obama the 5th best President ever."
These are the details according to Texas A&M:
1. Reagan & Lincoln tied for first,
2. Twenty three presidents tied for second,
3. Seventeen other presidents tied for third,
4. Jimmy Carter came in fourth, and
5. Obama came in fifth.
[Source] [ECS]