Thank you for attempting to help everyone out! A few points:
You mentioned A&B gefilte fish. I don’t believe it is KFP all year round. It has matza meal in it, which is not always KFP. It also contains canola oil, which is kitniyot, so Ashkenazim can’t have it.
You also mentioned R’ Maroof. I’ve never met him or spoken to him, but he is somewhat controversial because of his affiliation with Sarah Hurwitz. Posting his opinions about Pesach products here might not be the best idea.
Ultimately, I found that my biggest expense for Pesach is the matzah. It is more expensive (at least price per pound) than any other product I buy.