Grey scale shiny Pokemon comp?

I’d love a cool grey scale team comp suggestion for my first play through! I’ve only gotten Gardevoir and Sharpedo so far and I was planning to make my Metagross shiny through the NPC — I’d love some suggestions for people’s favorite white->grey->black shiny Pokemon in Unbound since I’m not aware of most of the custom shiny’s! No bad suggestions I just don’t want legendaries :) Thank you!! 🙏🏻