I recommend two specific audio books, since I already mentioned them in the chat and I immediately thought about them when I read the linked chat, and Gigili likes fairy tales.
The books are written by Kai Meyer and made as audio play by Zaubermond. They are about the Brothers Grimm as investigators in a setting that is a mixture of historical Germany and fiction. Goethe is involved in both stories, and you'll likely see him differently afterwards. There are a lot of great speakers involved and I really liked the books. Most German is well-spoken, it has a lot of very different speakers (so a lot of variation), and some dialects too.
I'd recommend to start with Die Geisterseher, though I had Die Winterprinzessin first, but Die Winterprinzessin has several references to the events in Die Geisterseher.