There are a lot of very good foods out there. However, if one really wants to feed our dogs what they would eat naturally, it would start with stomachs, intestines and their contents, internal organs, and would include feathers, feet, beaks, etc....also something we would be grossed out about ourselves. Both dog food rating sites have similar biases. They are good to compare contents.
I've been very happy with ProPlan, and all the dogs in my kennel have done very well on it. Not long ago, I had a client bring me three dogs. He did not want them on ProPlan Performance since it was, in his view, horrible, awful, terrible food that wasn't good for dogs to eat. He chose to supply his own, at his expense. I made a bet with him. I told him that I would put one dog on ProPlan and the other two on his feed (grain free, all natural, holistic, $70 a bag), and at the end of three months if the one that was on ProPlan, based on condition, fitness, coat, etc. wasn't in as good or better shape than the other two, I'd pick up the food cost for his pricey food. The end of the three months came, and the dog on ProPlan stood out pretty clearly from the other two....better in coat, condition, stool, etc. (and I did nothing different to that dog than to the other two--the only difference was food).
He switched the other two to ProPlan.