Well, little Napoleonic Europe.
Suppose Napoleon dies tragically right after Tilsit; a nation mourns the hero of Austerlitz and Jena, and amazingly the Bonapartes stay on the throne, in part because nobody knows what else to do. Still, Talleyrand runs diplomacy, ultimately by 1812 the continent is at peace, with a core Bonapartist state based on Holland, France with its natural borders, Northern Italy, and Western/Southern Germany.
ISTM that when industiralization hits, which it should arguably do sooner... ouch. On the other hand, such an unruly apparatus might have all the efficiency of the Austro-Hungarian Empire.
This is a bit rambling, but it seems to me that assuming it can stick together the rest of Europe ends up in the shadow of Paris.