I agree with AKC standards which define GSD dogs are as long than tall. But while surfing in internet I saw something called FCI Standard i.e. The standard where europe follows, this is the actual standards where germans defined for GSD, In their dog pics, I see the Hind Quarters are strong and taller than the AKC standard GSD.
I read the information about FCI standard in this website https://www.workingdogs.com/ls haw1.htm
Here the author compares DOG D(FCI Standard) and DOG E (AKC Standard). What I understand is FCI standard looks better.