I have been wanting an Ottoman army for my Napoleonics. They would work rather nicely for this purpose as well. So this is a possibility.
Then I was thinking of my Mother's stories about growing up in Dessau before and during WWII. For several years she lived in Schloss von Anhalt with the Duke and his daughter. That had me searching for what Anhalt had as troops during the SYW. It turns out that the Anhalt family fought for a multitude of sides.
I stumbled across this project and it seems to be a gold mine of information: http://www.kronoskaf.com/syw.
Prince de Anhalt-Cöethen Infantry regiment fought for the French. Before 1759 it was the Bentheim Regiment until it was taken over by the Prince.
Fürst von Anhalt-Dessau Cuirassiers. This cavalry regiment fought for the Saxons until they were captured by the Austrians.
von Anhalt-Dessau Infantry (IR3). This was a standard Prussian regiment that had three battalions.
Anhalt-Zerbst Infantry. 1 battalion of four companies and 50 cavalry. My favorite quote on this regiment which tempts me to model it is "an under-strength unit of undersized soldiers, and of little military use."
Prinz von Anhalt Infantry Regiment. This unit also made its way to the United States for the American War of Independence.
These provide some confusing and odd choices. I still think an Anhalt-Zerbst troops would be fun to do. I am thinking about three groups of musketeers and a group of grenadiers. Then a group of Carabiniers from the Cuirassier regiment.
I have no idea of what to do for an opposing force.