100% barred rocks, 100% girls. Boys don't get that color, and they have small yellow combs. And yes, the others ones are speckled sussex and also look like girls.
You've got two barred rocks, and those are definitely not Silver Laced Wyandottes. They don't look like Golden Laced Wyandottes either, because of their white bellies.
I think you've got a couple of speckled sussex chicks there. Often, the speckled sussex will have a white belly while feathering out. And they also have white legs, like your chicks.
That's my guess. I've had all of the breeds you've mentioned. It's amazing how chicks transform as they grow, and end up with a totally new look. Their feathers really change.