Thanks for your interest, Jim. I have to say I'm not even tempted to read fiction---history is just too fascinating

Flattop--Buchanan (said by some, including a Smithsonian article I read, to a be a strong candidate for the all-time worst US president), followed Pierce, who was the political pygmy elected in 1852. So it was Fillmore, Pierce, Buchanan. (I don't know why I put that in--just wanted to mention Buchanan, I suppose.)

   
Cleveland was elected in 1884--- "Ma, Ma, Where's my pa? Gone to the White House, Ha Ha Ha.". Cleveland also has the distinction of being the only president to ever have been elected to two terms separated by somebody else's presidency; in this case Benjamin Harrison. This is all asssuming my memory is accurate.