I’ve never had a smelly dog. I usually have spaniels and they smell pretty neutral. But I’ve encountered some pretty musky dogs or breeds.
Spaniels can smell nasty if you live in a cold wet climate. They love rubbing themselves in the woods to go into contra hunting mode, smelling like the dead.
Dogs that shed naturally smell less because they keep getting rid of the body oils. Again, doesn’t work if they like finding wet spots to relax.