They are barred rocks (cuckoo coloration is not as even as the nice lines coming in on these chicks).
However, from the amount of white coming in on them, they appear male.
I hate to agree, but you got a lot of males dumped on you. If the guy said he was giving you Black SLs, he could very well have been..... just Black SL males (who end up barred, with splashes of brown).
These are EEs (which are like a box of chocolates without the cheat sheet, color-wise).
The final bird is a rooster. I agree that picking for temperament is more important than color.