Do dynastic unions count? In which case I proffer this:
Habsburgs in Spain, Portugal, Austria, Belgium, Southern Italy, Lombardy, Burgundy, Switzerland (quash the rebellion against Austria), Bavaria, Hungary and Bohemia.
Bourbons: France
Stuarts: England, Scotland, Ireland, Wales and the United Provinces (maybe the UP decides they want a good foreign-born king who'll let them get on with things and get a nice Protestant Stuart).
Wettins: Saxony, Poland-Lithuania, Prussia, Brandenburg (taken off the Teutonic Knights maybe). Have an alternate Edict of Nantes in effect so that Catholic Poland and Protestant Saxony and Brandenburg can co-exist.
Brunswick: Hanover, Anhalt, Hesse, etc. the North German states (serving as a Protestant counter-balance to the Hapbburgs.
Romanov: Russia (obviously).
Osman: the Ottoman Empire including Moldavia and Wallachia.
Wittelsbach: Sweden, Denmark, Norway, Iceland and Bremen.
NB the aufklarung went similarly to OTL so although Germany's balkanised, it's still fairly homogeneous.