I would think the RIR is the top middle because it is darker. I have a hard time telling the difference between RIR's and Red Sex links though. I just call all of mine collectively "the reds."
Top left Easter Egger and another EE next to it, Black Austrlorp= black one, Red Star is to the right of BA, yellowish=Buff Orpington and the dark red one at the bottom id the Rhosde Island Red.