Oh no, FDR? After I learned about Timor Leste and Carter, I thought there was at least one really great president… I guess I’m going to have to angrily read Wikipedia
With all seriousness, though, I think it's reasonable to judge historical figures by the standards of their time - at least the higher standards of their time. Those who take steps away from repeating the horrors of our past should be (critically and conditionally) admired, while those who take steps back should be scorned as the shitheads they are.