I think suggesting that you get yourself a retired Greyhound is a good idea. They are born and bred to run but once they get older they don't want to run. They want their chance to be lazy and loved, too. I think adopting and saving an animal from a shelter is good too. You can find all kinds of lazy dogs when you visit your local shelter. Just remember that the dogs in shelters really do need a home when you are looking for a big, lazy outdoors type.
We have a nine year old Pug, our son has a Shetland Sheepdog that's five, and we also have a 14 year old Chow Mix. All of them have been neutered, all are very happy and lazy and the first two are inside dogs because one has a smashed in nose (brachycephalic is what they're called, I think) and the Sheltie has long hair.
I would suggest the Chow Mix of the breeds I have as well as the retired Greyhound. I doubt if you are going to find a Shar-Pei in any of the shelters and any type of dog that has a flat nose is not a good candidate to stay outside. It is too hard for them to breathe in hot weather.
Make sure that you get a dog with a long muzzle if it is going to stay outside. It makes it easier for the dog to breathe if it has a long nose or muzzle and a short haired coat. An outside
dog with a short coat and who's neutered will cause a lot less problems for you.
Labs, Dobermans, Mastiffs or Rottweiler mixes will be a lazy dog and it will enjoy the fact that it has been rescued and has a second chance at having a home with you. All of these dogs
are 100+ lbs and it makes them a large breed dog. I hope I have been of some help to you. Good luck with your dog!! ☺
I've been a dog and cat lover all my life. :-)