You can find what you’re looking for (a more laid back dog) in both working lines and West German Show Lines, you just need to find a good breeder who know’s their dogs and will be honest with you about their drives/energy levels and pick a puppy for you that matches what you want. I’d personally avoid any breeder like Royalair. I don’t like Breeding out of the standard, and seems like although they have produced some good family dogs (temperament and health) in the past, that may have changed. I’d research more.
An 85-90lb male West German Showline dog With a full plush coat will look much larger than it actually is, I’d say closer to a 110-120 lab or other dog like that with a short coat. And there are very reputable WGSL breeders I’d feel much more confident getting a dog from