the last is a cockerel and, just going on instinct here, the first is a rooster too, but the other two of pullets
EDIT: the first to look like wheatens, the third a splash, and the last is blue
Thanks for the help! I was a bit off, I was thinking all of them except the top right were cockerels. I should have said on the first post that the last one is HUGE! and his comb is the most developed of all of them.
I think hdowden is right on the colors. I think you have at least 3 ckls and the top right is most likely a ckl also. The key word here is "I think" so would not make any hasty decisions.