Ok here's my Napoleon I. Briefly .... many epiphany's later
He doesn't declare himself Emperor, and doesn't get caught up in trying be accepted, respected by other Monarchs. He remains a republican, and not an empire builder. Just for arguments sake.
He doesn't annex the Rhineland ( This becomes part of a German Federation ), He doesn't annexe the Batavian Republic, he doesn't
annexe any of the Italian terretories, sets up an Italian Republic - as he did - but including the terretories he annexed. And he never get's involved in Spain. Also see's the foolhardyness of the Continental system and never implements it.
So this is a Napoleon that, rather than antagonise German and Italian national sentiment's he respects it. He skillfully does what he can to build states, that have a vested interest in preventing Austria, Prussia, and Russia from reinstituting the old order.
This the sisuation by 1808.
Unsure however as to the situation regarding Sweden, vis a vis Denmark getting Norway, Swedish disatifaction - also the question of Finland.
How much more satiated is German Nationalism now, to what extent does dismantling Prussia affect this.
Can he give Pomerania to Sweden ?, with a secret offer of Finland and the Russian Baltic territories to Sweden in a future war with Russia.
Possibly unthinkable, - but i'll throw it into the ring. Can he give Prussia to Poland. Set up an independent Bohemia Moravia - possibly including Silesia. The remains of Prussia is then amalgamated in to the German Federation - capital Hannover ?.
How about an independent Hungary, including present day slovakia, Italy recieve the Dalmatian coast. He disregards the Pope, and give Rome to the Italian Republic - which becomes it's capital, and proceeds to take southern Italy and Sicily adding them to the Italian Republic.
Does he have more or less trouble on his hands now, with three large nationaly constructed republics, Italy, German Federation, Republic of Hungary. Can they be reliable allies or is it going to dissolve into internecine chaos.