Actually, German Shepherds can get along FINE with other dogs, FloppsyLadySally89 is just speaking about her own experience. I know plenty of Shepherds, and Shepherd mixes, who get along with other dogs. It all depends on the individual dog, and how the socialization - and the introduction - goes. In fact, if you work with a GSD Rescue organization, they can always tell you if the dog you want gets along with other dogs or not!

And a Shepherd does sound like a good match for what you want in a new dog!