I would also have to say the most human Abe Lincoln.
Lincoln killed the last vestiges of ancient régime in the Americas, and Roosevelt buried it in the Old World.
America is such a weird country, an empire with cheat codes enabled, with oceans for moats. It could do whatever it pleased. It put the man on the Moon while losing the space race, and then said, "screw space, we're exporting pornography and Islamic fundamentalism now". And they did.
On the topic of presidents - I might add, it's highly ironic how Kennedy is worshipped by right-wingers even though he was the one who desegregated schools at gun point.
And regarding my own country - it would be cool to blame Bush Sr for the fall of the Soviet Union, but it looks to me like the USSR fell apart on its own, and Bush was just kind of there as a passenger. Such a missed opportunity.
Or take Clinton - a warlord who bombed Yugoslavia, got impeached over extramarital coitus. Domestic affairs take precedent over the foreign ones.
Bush Jr was one funny chap, heard the voice of Jehovah, then presided over the economic crash.
Obama got the Nobel Peace prize for invading Syria & Libya.
The Orange Man didn't built the wall, but the sheep are still voting for him.
Now two old White Men are robbing America of a possible non-White non-male president in 2024, and everyone is cheering, lmao yikes.
And finally, what if Biden is the final President? What if Mark Zuckerberger and Elon Musky plunge us into AI singularity sufficiently rapidly so that Joe the Hairy Legs enters the first cohort of people with an indefinite lifespan?
If you want a picture of the future, imagine a nose sniffing a child's neck — forever.