>>55714592Corn. Dragonite has corn.
That makes it very valuable, especially if you find a BFS Dratini.
Tyranitar's niche is being a dark type that gathers gingers, beans, and sausages for Snowdrop Tundra. It gathers those ingredients in excellent quantities too.
In terms of ingredient strength, Dragonite, Tyranitar, and Bewear are the best right now.
Raenonx' ingredient strength tier list is based upon the number of ingredients per slot, the strength of those ingredients, the Pokémon's ingredient gathering rate, and their helping speed.
It doesn't account for the ingredient diversity needed to make certain dishes, if they have ingredient magnet S, etc.