1,2, and 4 all look like EE/Ameraucana (Easter Eggers, but a lot of places sell them as Ameraucana, in general they are mixes that hopefully carry the gene for blue egg color), 2 & 4 are probably males. Can you get standing and side pictures of #3, that looks like it has a single comb, could still be an EE but might be mix of something else with the feather color.