What about the East Germans?
(Hitler, btw)
Good question.
It would have been an interesting problem, as West Germany proclaimed she was successor in law of old Germany (national public law and international law) and as, until 1973, the 2 Germanies considered each other as a non-entity.
So, to stick to international public law, we must drop East Germany.
One small point would have been to choose who should be put in the list, as chairmen of council of ministers weren't the top guys in DDR (granted, in old Germany, the Kaiser, not the chancellor, was the top guy at the beginning of the century or just before WWI).
Anyway, I wanted to stick to the "Chancellor" title (granted, I should have excluded Scheidemann, who was Reichsministerpräsident, but that would have been unfair, as the man had an important role in history and as it would have created a hole in the list; and every rule has its exception
).
But, don't worry, I will make a big history Survivor this autumn and Ulbricht and Honecker will be in
(and I'll seek advices before launching it, even if it will be more a list of my choice, without any strict rule).