Help with chick ID

[PaigeBChicks]

I have two breeds of 6 week old chicks that I got from Tractor Supply and I need help identifying what they are. I was thinking the black and white were cuckoo Marans but they have this patter on their chests so I’m not sure. The grey ones I think look like Sapphire olive Eggers, the hens are very small but one is a rooster and it’s double their size. Maybe this is common for that breed?
I appreciate anyone’s help!

 

[Chicky Lover]

Lavender orpington and barred plymouth rock maybe? ( I am new to chicks too)

 

[PaigeBChicks]

I have Barred Rocks and their patterns are different. And I had a lavender Orpington, they are rare and usually more expensive. I got these in the store for the same price as the others so I do t think those are likely. Thank you though!