Retired greyhounds (hence my avatar). Sweetest, gentlest, most couch potatoy animals you'll ever meet (unless you're a squirrel). They don't have that doggy smell, no fur tumble weeds, take up little space and are low on the allergy scale for humans.
I had two girls, a matched but unrelated b&w pair that looked like cows. One came from a million dollar winning lineage, fast as lightening but didn't give a crap about chasing anything. The other was not the brightest bulb, a huge clutz, and never caught a squirrel in her 12 yrs of trying.
And they lived with our two cats who ruled over the dogs.
I'd have more now (they both passed due to old age), but our first dogless summer was cut short when an abandoned beagle pup jumped into my truck 2 years ago. He's an awesome dog too. Not food centric, quiet around the house, major snuggler. Tough as nails.
And now we've inherited my father in law's golden retriever. He's a sweetheart who would love you to death, but there's not a lot going on upstairs.