Id say #3 is most likely a pullet as those saddle feathers are still rounded and not at all pointy. From what you say and what I have read tail feathers should be ignored at this age for sexing completely.@knoturavggrl I finally got pictures of mine for you that are about a week behind yours, age-wise.
Hopefully the pictures are clear enough for you to see the difference in 'drapiness' & 'pointiness' of saddle feathers, BTW, I don't find hackle feathers a true indicator at this age, as both have 'semi-pointy/semi-round', and it is harder to tell. (Mostly, because at this age, all have generally narrower hackle feathers, so , depending on the chick, it may be hard to tell.)
Tween #1:
View attachment 3269042View attachment 3269043View attachment 3269044
She has slightly drapey saddle feathers, but they are 'full' and blunt/rounded ends. Very much a 'SHE' despite her having one longish arched tail feather.
Tween #2:View attachment 3269045
View attachment 3269046
HE definitely has drapey saddle feathers, and the ones just behind the wing feathers are definitely pointy as opposed to blunt shaped on the end.
Tween #3View attachment 3269047View attachment 3269048
This one also has some drape, and an arched tail feather like a Roo would. Look at it's saddle feathers and tell me what you think it is. Cockerel or pullet?
Thank you for the pictures it means a lot that took time to take them for me

Your babies though are challenging though goodness me definitely cant just look at the comb/wattle development to tell!