I have some old Ridings-McIver ranking from early 90s.
1. Lincoln
2. FDR
3. Washington
4. Jefferson
5. Teddy
6. Wilson
and then:
12. LBJ
15. JFK
19. Carter
26. Reagan
32. Nixon
33. Coolidge
Don't you love such rankings? :-)
BTW, Harding is last.
Pray for W and Our Freedom Fighters