First one looks like it may be cockerel. Others are probably pullets. How old are they? They look young. First one may be barred rock, the others may be Easter Eggers, I do not see any muffs on the cheeks, which is classic for an ameraucana (the two are often confused). Hope someone more knowledgeable anwers as well. Nice looking birds!
How old? I see all roosters except for the last one.
First one is either a barred rock or a black sex link rooster. Than maybe a production blue roo, a leghorn roo, and a barred rock or marans pullet. I can't make out the leg color.