I just don't think it's accurate to do it now.
https://www.brookings.edu/blog/fixgov/2015/02/13/measuring-obama-against-the-great-presidents/
Brookings is a solid source, though moderately to the left. What I like is that they use a variety of sources and a compilation shows Obama 18th, though this was done last year when the economy was weaker and Obamacare was in better shape.