looking for best dog food

As RonE said, there's no one best kibble for all dogs. Like humans, dogs have different nutritional needs based on their genetics, metabolism, activity level, climate they live in, and any allergies or intolerances they might have. Something that's super healthy for one dog might make another super sick. Some dogs have so many allergies they can only safely eat very expensive prescription diets with hydrolyzed protein, while others live long, healthy lives on the cheapest food available. Some people have to feed cheap foods, because their dog is picky and refuses to eat anything else, and it's better that they eat lower quality kibble than starve.

No recalls is not necessarily a sign of a good food, nor is grain free (and I'm someone who feeds grain free formulas fairly regularly). You WANT a company that will voluntarily recall food if anything goes wrong, and will do so early enough that as few pets as possible get sick. And there's lots of grain-inclusive formulas that work really, really well for lots of dogs. There appears to be a risk of diet-associated dilated cardiomyopethy (a serious heart problem) from feeding grain-free diets that rely on pea and legume products, but research is still being done so we don't fully understand what makes a diet high risk yet. Some people choose to only feed grain inclusive diets because of this, especially if they have a breed that's already prone to heart problems.

In the end, the best food for your dog isn't the most expensive or fanciest. It's one you can afford, you have access to where you live, your dog eats well, and appears healthy and happy on. This includes firm, regular stools, shiny and soft coats, healthy skin, maintaining weight well, and having a normal level of energy for their breed and age.