Something to Germany or the "German Influenced Area of Europe". Countries within this part of Europe should have special dynamic events, depending on their common cultural heritage.
Some may say that there was no german nationalism in this era, but i would say, because Napoleons Wars and Conquests were the beginning of the German Nationalism, and because EU is a series in which conquest is the main part of the game, Germany or its states, should be in the first tier.Perhaps along with Austria. Its Nationalism could rise through foreign Intervention and Conquest (There were first steps of the development of Nationalism after the 30-years war). Its pretty clear that despite from Austria, and later Prussia, no German State was a "great power", but the Germans in general and the HRE were very important for the development of Europe, I see them in one line with the french, english and iberians.
So, Germany should be a focus, and in tier 1.