The one in front is an Easter Egger. It has coloring the usually indicates a pullet, but it's too soon to be 100% sure.
The back one look to be a Buff Orpington.
I agree EE for the front one. Back one doesn't look like a Buff Orp to me as they usually have pink feet and your bird looks to have yellow/orange feet. It could be a Tetra Tint, a sex link rooster... not sure.
Very helpful since in some of those photos the feet on your buff bird look pink! I'm interested to see what he/she will look like fully feathered out in a few weeks.