@louy51 It's somewhat of a shame that off leash recall is a priority for you, because in every other respect, you sound great for a retired racing greyhound. You want a rescue, low energy, super friendly and gentle, low barking, happy to sleep on the couch for hours. You have no other pets or children and you have a fenced yard. You live in a country that has a ton of greyhounds needing homes. You ideally only want to walk about an hour total a day (the majority of dogs need more than this). A lab could work....but many are higher energy than a greyhound and would not necessarily have their needs met with the amount of daily walks you're hoping to do.
Only sticking point is that you
cannot let a greyhound off leash anywhere except in a fenced area. This wasn't a problem for me personally, because I consider off leash to be unnecessarily risky in any case and with any dog, but not everyone enjoys that aspect. Something to think seriously about... because that really is the only incompatibility that I see.
Bonus benefits of greyhounds - they come to you already young adults and not puppies, so you don't have to do the considerable amount of work to raise a puppy. Also, greyhounds come complete with admission to your local greyhound cult er-
community. Greyhound people tend to find each other and plan walks and activities together and babysit each other's dogs and it's great fun.