Looking for the breed

[Glacier]

Have you considered a greyhound? Despite their reputation as very high energy dogs, they actually make great apartment dogs. Their exercise needs are much lower than people think. They love a good run, but they are also couch potatoes! I don't have a clue what they are like off leash, but there are grey owners on here who could probably tell you more.

[IRescue452]

From what you are looking for I see that you don't mind a large shaggy dog. With a dog walker they will get the exercise and socialization, but you would have to do a lot of training also. You seem to want a playful dog. I was going to recommend a chow, but a chow won't play much. A St. Bernard, bernese, or newfie are good for the qualities you are looking for. Have you looked at the briard, bouvier, or otterhound? It sounds like you want a serious working breed that will take to a daily routine. The dog walker sounds great, but you will also need to provide some exercise. Also with some larger breeds, though they are meant to work for hours, will not like three consecutive hours of midday walking or playing when the weather is hot.