One dog everyone might want to consider is a female Chesapeake Bay Retriever, they are very homey and never wander. We let ours roam free and it has never run off. The males are much more territorial though and you might not want them, they may wander as well I don't know I only know about the female ones. They are great swimmers and very nice, they are used as bird dogs and I think are somewhat more obedient than the average dog. Ours is great.....
Good luck with the new puppy!