Yes, progressives sure were rare in the Progressive Era.
I don't dislike Grant on a personal level. He was a competent if not particularly outstanding general (it's easy to look competent when you're surrounded by idiots; same thing with Lee), and as a person he seems to have been neither remarkably good nor bad. But there's no getting around the fact he was a bad president. He didn't participate in the scandals of his administration, but he did enable them to happen through his poor judgment and he failed to do anything about them.
TBH America is the third most boring civ in the game after Australia and Canada so to an extent I don't care how it's designed. Military civs are also boring so in that sense I guess it's a match made in...purgatory.

But as an American historian, I don't like the idea of America being led by one of its worst presidents. Grant was politically inept, and his skill as a general has been overstated. IMO American presidents who are Civ leader material, based both on competence and image, (without commenting on whether I would actually want them or not) would be Washington, Adams, Jefferson, Madison, Polk, Lincoln, TR, Coolidge, and FDR; one might make an edge case for Monroe, Van Buren, McKinley, Wilson, Truman, and Eisenhower. However, FDR, Truman, and Eisenhower are already in iffy territory regarding political controversy, and in my opinion anyone more recent than Hoover is too recent. (Hoover--great guy, lousy president.)
I mean, to some extent one expects unique units and infrastructure to be stereotypical because there's a thin line between "iconic" and "stereotypical," but to me the Hockey Rink feels trite where the Sugar Shack does not.