Be an interesting choice for a GNW army would Prussia.according to the wiki
Great Northern War (1700–1721)
After the death of his father, King Frederick William I joined the coalition against the Swedish king, Charles XII, with the aim of capturing the Swedish territories in Pomerania. As a result, the Prussian occupied Stettin in 1713. In November 1714, when Charles XII took personal command of Swedish Pomerania, the Prussian Army, together with the Saxons and Danes, was able to force him back to Stralsund in 1715–16 during the Pomeranian campaign and besiege him there. After the end of the war Prussia gained Stettin, Usedom and all territories south of the Peene.