Updated Photos of 1 and 3. 1 turned out to be a very nicely behaved rooster with lightly feathered legs (part cochin?) who has been allowed to stay.
2 was also a rooster, but not very nice, so he was rehomed. I don't have a photo, but he was solid blue.
3 turned out to be very striking. I assume she's a silver partidge, but maybe heterozygous on the partridge or with some extra melanizing genes since she's darker than most silver partridges (her eyes and skin are also black).
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4 and one of 5 or 6 disappeared before reaching maturity. They still have either of 5 or 6, but she's pretty flighty and hard to get a photo of. She basically looks like this New Hampshire Red below or any black-tailed red breed, but with a pea comb.
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All lay light brown eggs.