I like your list of dog sites except one.
They have not updated the ratings page for awhile now, but also I do not trust sites that rate foods, there is no such thing as the best commercial dog food, just good ones and bad ones. Also when you go to ABOUT it explains that the Editor of the site are a bunch of volunteers with a high interest in dog food. We have a high interst in dog food I cant call myself an expert.
I like www.dogfoodproject.com
She also explains why sites that do rating on dog food are not that great. and the Author also has a degree in pet nutrition. Anyways that is my opinion.