If you’re looking for more Grimm fairy tales, there are some: there was another brother, Ferdinand, apparently the black sheep of the family. He also published fairy tales, but was largely forgotten. Some of his tales were rediscovered and published (in German) in 2020. I read a few and they sound like authentic Grimm.
https://www.aufbau-verlage.de/die-andere-bibliothek/der-frem...