Perhaps you're looking at the wrong working line breeders? Lol, I dont know.
The collection of GSD breeders I have on my computer all have dogs with the nice level topline like Addy. It's quite common in the Working lines. IMO, they are the only lines that stay true to the original GSD standard. I'm very particular about what I want a GSD to look like and have managed to find quite a few that fit my description. [i.e. Addy-like structure]