Dogs don't ask for much, If you can afford get them the good stuff!
I would recommend Iams Eukanuba, which is what we fed our dog until we ran into an Iams testing video and then read up on their practices. Such a fucked company. The animal testing they do is barbaric and cruel. I never jumped ship from a company so fast as Iams. I'd go into detail, but it is truly sickening.
Purina is the first to send pallets of food to disaster areas. They're the first to send medical aid to Iditarod dogs. They do a lot of charitable work in the animal field. They aren't without fault, and I'm not foolish enough to think their charity isn't driven by marketing. Nevertheless, they're an action company. They do things.