Decide the next 'Eavy Metal Marines (Patreon)

I was able to pick up a copy of Indomitus! I'd like to paint one of the more special space marines for 'Eavy Metal Marines. Suggest some chapters for me to paint! I'm not going to redo a chapter I previous painted, and I'd like to avoid doing a chapter that's a similar color. For example, I've done Black Legion, so I'd be less interested in doing Black Templars (unless there was a sweet alternative scheme, because those bladeguard scream black templar)