I'd guess either walleye or whitefish. Walleye is one of the best eating fish out there. Whitefish is good eating too, and great when smoked.Tilapia is a little bland and I dislike catfish. I like most other fish, but trout is probably my favorite.
I once had some kind of white fish at a fish boil up in Wisconsin. I wish I knew what it was; it was so good.