Your last 2 pics are of he potential dads? A bronze and Siler Pied? BSSP? Your first pic looks to be a coming black shoulder male.This same chick is in your 4th and 7th picture? definately b/s pattern,and with it's "mottled" looking back with so much black growing in now it will be a male.Getting the b/s pattern from your BSSP male and the genetics are a guess for me,,but since the hens are IB,,phenotype,,your b/s chick will probably be IB phenotype as well since IB is a dominate color but the chick should be carrying two copies of w/e?
I have 3 chicks hatched this year that has 2 copies of w/e gene that does not have 1 white feather on them.So I'm guessing you have a IB/BS male carrying 2 copies of white.I have not hatched a black shoulder chick without having at least 1 parent being black shoulder.To get 100% all b/s chicks,both parents has to be b/s,,I can see the barring on the upper wing feathers on the bronze male you have.So I think the b/s pattern in your chick has came from your second male,,