What breed?

[SharpeChickens]

I know that the two black ones (with the smaller combs) are black Australorps and the speckled ones are Plymouth rocks.

 

[Hufflefluff]

The one with the muffs is an Easter Egger. The third black one also looks like an Australorp to me, but I've never been great at telling them apart.
The white ones look to me like either meat crosses or some sort of overweight white dual purpose- maybe a white rock or jersey giant? I hope someone else can offer some more expert advice. You have a beautiful flock.