I'm inclined to agree on your cockerel/pullet assessment. Not 100% sure on the one whose breast color you commented on, but the rest I think you're exactly right.
Helen totally abandoned her chicks at 25 days old and has gone back to laying. Two boys and a girl are four weeks old today. They all have feathered legs like their father. It's so funny, I have only two feather-legged chickens. One is a young pullet, not yet laying, and the other is our primary rooster. I guess we will have a few more in the future, lol. Prudence is still looking after her chicks. They wander pretty far from her, but that seems to be their choice, not hers. Helen's chicks sometimes follow her but more often are found on their own but together. One of Prudence's chicks (three weeks today) is a boy, the others are still too hard to determine.
I have a couple more hens, Snowflake and Marshmallow, acting broody but not sitting reliably yet. I know it means egg production might go down a little, but it's also awfully fun.