Today I will be suggesting the line between Freiburg and Hausach in the Black Forest. It’s quite a unique route with steep bends and curves, almost being like a German Tehachapi Pass. Sorry this is a short suggestion, I had trouble finding information for this one.
Try asking Forum members who are familiar with that area. Also this is a TSC route try asking that community too
If you want my opinion try and avoid any routes with loads of "unknown" details unless it's something your really passionate on.