They all look like pullets except possibly the last one. It could very well be a pullet as well, but more pics would help. Could we get a full body side pic?
Are the first 2 pics the same bird? The first pic looks kind of like a rooster, but the crest seems nice and rounded, it's just the tail feathers are a little longer. Maybe wait a couple weeks and see if it crows or lays. The others look like pullets.