Vlad and Bane look to have some spangling going on. The only spangled breed I can think of is the hamburg, but those guys have rose combs and they're light-bodied. Your birds look pretty heavy. If I were to guess, I'd say that they have some spangled hamburg way back in their ancestry, and then some orpington/australorp/single-comb wyandotte further up. Whatever they are, they are very pretty and unusual!
Darth looks like black copper marans.