Duchy of Courland, 1579 (AzeriEU3 mod).
It might not look much, but I've built my nation to be ridiculously powerful militarily. I've just come off a war with Poland, Finland and Vitebsk where I managed to free Prussia (who are now studiously ignoring my attempts to vassalize them) and where my troops got something like 5-1 kill ratios. Once Prussia finally gives in, I think I'll be aiming to get my hands on one of the CoTs in Novgorod or Gdansk.
On the religion front, Central Germany is the main base of Reformed nations, while myself, Sweden, Finland and Italy make the majority of Protestants. Sadly Burgundy and Poland have done a good job of crushing other isolated pockets of interest so the rest of Europe is majority Catholic.