I'm terribly sorry, but the only pullet pictured is the third photo. The first two are, without a doubt, young roosters. Those big red combs and incoming saddle/tail feathers confirm it.
Orpingtons are late bloomers, so I'm not shocked the Breed & Gender community didn't think they were...
Those little cream eggs are almost certainly hers, assuming you don't have any other hens that aren't brown layers (from what I can see, which is Barred Rocks and ISA Browns, you have all brown layers). It's good that she's laying! Means she's in good health and is not too stressed by the...
Sorry, but better photos are needed - photos more up-close of their backs and faces.
Black one is a male though, he has male-specific feathers coming in.
So is the little red and gray one in the last photos.
Male looks like a possible Tolbundt Polish mix - but definitely a mix, as his comb is wrong for the breed and his legs are yellow, not gray. He's also quite lean, even for a Polish. I'd guess he's got some game mixed in.
NOT a black sexlink. The girl is some sort of gamefowl mix, which are...
I'm really not sure why everyone is convinced this is a pullet. Not trying to be rude, but look up "saddle feathers" -- probably the most useful gender identification tool, considering ONLY males have them. And this guy has them. It is without a doubt a cockerel. Late bloomer, sure, but even the...
Pullet. I had a light one just like that who got big and tall really fast, grew a bright red comb, and I was told by many people that I had a cockerel. (I thought I did too!)
She laid me lots of big brown eggs. Miss my dearly departed Pepper.
I'd be shocked if yours ends up being male.
I don't think she's a bantam, just....little. As long as she's otherwise healthy, she's just developing her own way and eggs might take a bit longer than usual. It's also possible she was starved or very sick as a chick and got stunted.