Hi
I assume you are aware that you have a pair of barred Plymouth Rocks ie a male and a female. The barring on the female looks more cuckoo but her legs are yellow so that rules out a cuckoo Marans so must be either Barred Rock or Dominique. Can't see her comb but I'm assuming that it's a single like his and that they are a pair. If she has a rose comb then she's a Dominique, but he is definitely a barred Rock
I would hazard a guess at the other two being a Blacktail which is a Rhode Island Red x Light Sussex hybrid and possibly a Speckledy, or a cream Legbar or maybe even a Silver Campine, but individual close up photos would help as you can't really see much detail from that distance,
Nice looking little flock.