At 8 weeks, it's too early for male specific feathering in the tail or anywhere else. So far this one looks to be a pullet, but I would give it more time to be sure.
The first two are males with combs so big and colorful at eight weeks. I'm not sure the third one is female. It may be a slower developing male. Better pictures of that one might help.
1 and 2 are partridge-- they looked black in the previous photos, but in these ones they look right for partridge.
3, 4, 5, 6 probably are white. I'm seeing no blue on the feathers. Time will tell if that develops later-- it would mean they are splash instead of white, if it happens.
7, 8, 9...
4 looks to be a female Faverolles.
3 has no black breast feathers, but the comb is colorful. Mixed signals.
1 and 2 are red colored, look to have yellow legs and maybe pea combs. I don't believe they are pure Faverolles.
Males will have black feathers on the breast, females will not with this variety. I think the one in the middle may be a male, but give it a couple of more weeks until they are fully feathered out to be sure.
The brown chick isn't a lavender Araucana. Wrong color, wrong comb type. Its headspot means it will be barred. It may be a Legbar or Legbar cross.
The other chick looks lavender but I'm not sure if it is pure or not.
That's true, but neither are Orpingtons. Flightier breeds are good at avoiding ground predators but not aerial predators. You really can't win on that front.
Tractor Supply mixes chicks up all the time, and they'll move leftovers into brooders of new varieties they stock.
Black sex links are a cross between barred rock and RIRs, not partridge rocks. I'm not 100% certain yours is a partridge rock, but the resemblance is strong. I'll post an online...