I missed the nutrition part until Nancy commented. Nancy, I've been studying nutrition about 35 yrs now and every few years it is learn and unlearn and learn new. BUT, I generally trust Whole Dog Journal's list as well as Dog Food Adviser. I do think Whole Dog Journal is a bit more trustworthy.
That said, there's a billion options. Do you want to feed just kibble? Or meat rolls? Or combo? Or raw? or raw and kibble. As Shirley pointed out in another thread... you don't need a degree in nutrition to find good sources.
First is making darned sure the source is USA or a trusted location. If you aren't fanatical about learning where you can trust... just stick with USA and Canada. Here is a tip. If the package does not SAY "all ingredients sourced in the US", they aren't. Most, actually do get vitamins from other countries... but at least make sure the meat is sourced here. If it only says "Made in USA"... guess what? Don't trust where they got their meat. Some places online and stores either only sell USA sourced OR they have a separate listing/area for them.
This has a decent list of foods, most of which are considered high quality. Sadly, keep up on news as they do sell out and quality can crash:
This is the 2015 Whole Dog Journal list
If you have specific questions about nutrition, someone here can help.