Not sure who would be the best to add to the list--Beethoven? Goethe? Schiller? Von Steuben?
Maybe should find someone whose birthday is either between late June and early August, or between Chrismas and New Year's, so that celebrating his birthday wouldn't mean cancelling a day of school.
It would be more appropriate to commemorate Steuben and
all later German-ethnic militiamen (e.g. Missouri ) by
reviving the formal citizen militia.