I like the grey paint scheme. In person it looks really good with the silver trim, as you say.
I also like the wolf prince a lot. He looks plenty wolfy to me, and surrounded by his underlings it's even more that he isn't a rat. Plus, he has fur on his tail instead of a disgusting hairless rat tail.
Drake looking good too, I think the scheme is working for the army. Grey/Silver/Red/Black definitely looks good for a wolf/chaos crossover.