Fresh food is a different situation. "Fresh Chicken is #1 ingredient" is a trick involving weighing the chicken before it's dried out (as it MUST BE in dry food) to elevate its position in the list of ingredients (where ingredients are listed in descending order, by weight).
TBH I've not really looked at how that site ranks the fresh foods, they've exploded since I used to frequent the site. But at least the ideas about wheat, corn, and by-products are likely to be similar to how they're judged in dried products.
I only have feral cats I feed these days, and they get Kirkland Maintenance Cat, which is an EXCELLENT value for its ingredient list, which, while not quite truly premium, is really pretty good. A similar quality food (Diamond Maintenance Cat, which is almost identical in formula, many people posit that Diamond makes the Kirkland version) in a similar size bag is usually at least +50% at a Farm Supply or Chewy. But that's the only pet food I've ever bought there or researched 
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