How cool that this quiz made it! :) For anyone who'd like a quick overview of who these people were, go to this blog article. I had meant to write for a long time, and now this quiz getting selected has made me finally do it.
During the Weimar Republic alone, there were 16 Chancellors - more than one per year! Only hardcore history nerds will know all of them. From the top of my head, there's Ebert, Stresemann, Brüning, Papen and Schleicher, the last one before Hitler. Schleicher is easy to remember since it means "crawler" or, figuratively, "brown-noser" in German.
Although jokes aside, 16 years in power does seem a bit much to me. As flawed as the American political system is, I think having a cap of 10 years (8 in practice) for an executive is a good idea.