Adams tends to be a good answer as well. The name always rings a bell, but no one can ever recall what he did. Plus, there were mutiple of them, so if they say you are wrong on something, you can just say you meant the OTHER Adams.

That also works for Roosevelt.

Or Bush, Johnson, and Harrison. And you can also say Taylor and later claim you said Tyler. Or Cleveland and they say "oh, I meant the other term."

Taylor and Tyler were complete opposites of each other, though. Taylor was a celebrated war hero from the Mexician American War, while Tyler was simply thrust into office after only a month of being Vice President. He was at odds with his own party (the Whigs), who he was only a member of because of Harrison.

Bu yeah, the Bush, Johnson, and Cleveland administrations could work.

I love history :D