Disunited Germany as long as possible (to 1900 at least and to the present if possible). The yellow area must have at least five independent* states, with more being a bonus, and continuity with HREGN princely states is also a bonus. POD after... say... 1789.
*And no Second Reich "independance" crap, either.
Now, for all that this is kindof on a whim, I'd like to think about this seriously. The wiki
suggests "a bunch of authouritarian, troubled states" which seems like a good jumping off point. German nationalism, as Susano will tell us within three posts of the OP, was a going thing by the start of the 19th C, but that's not
necessarily going to be sufficient. If we can get Germany screwed up enough through the 19th C we can pull this off (I think).
So: FRWars go differently. HRE survives, maybe? Austria gets messed-over, which leaves this massive vacuum in Germany? Also, we need the other powers to have some interest in the status quo in Germany, and keeping eg Prussia from taking things over. If we get the Germans, a la LTTW, to think the Austrians are a bunch of evil bastards, and the Prussians for whatever reason come out of the war hated and feared by the Russians, Swedes, little German states, so they'll keep it from pulling a Bismark, and a massive reactionary takeover of the individual countries, maybe via some kind of 1848 gone horribly bad - can we get to 1900 this way?