Buff Orpingtons lay cream colored eggs, my EEs lay blue eggs, (but yours still could lay blue, green, white, etc.) RIRs lay cream colored, sometimes with white dots, I think Wyandottes lay cream also....
Does the Buff have a single comb? If so, She's a Buff Orpington. The red hen looks like an EE mix. Could you take more pictures of the bantam in the last picture?