I must certainly feel Prussia should be the next nation, the Netherlands and Ottomans at a close second. Despite the Dutch having a strained economy, and pulling sailors from their colonial holdings after regaining their independence, they were still a very capable Navy. So I'd like to see the Dutch in Naval Battles above all. As well as the events of the Anglo-Turkish War and Egypt.
But yeah, get the big Waterloo names in first I feel, Prussia and Netherlands first. Then Ottomans and other extraneous nations. Maybe even America down the line with War of 1812.