This one has always been smaller than the rest of the chicks but not quite as small as a bantam.
It's the chicken in the back, I just threw this one on here to show the size difference. It has really nice lacing, let me know if you need better pics.
keep the guy with cross beak. You may have to hand-feed him or deepen your feed and water troughs so he can drink and eat though. and yes, he does look like a handsome EE!
No sure on breed for 1 but I think pullet
2 is a Golden Laced Wyandotte ( GLW ). He is Rooster, no doubt.
3 looks like a Sussex x Araucana, so EE. It can't be a braham as it has no feet feathering. I think it's a pullet but more pics will help.
4 is an EE, looks like a pullet. You may want to make another thread on his crossed beak so people who know about it can help you. He will need some help on that.