Impulsive buy! Need help identifying what breed my chicks are.

[Purebreed]

A weeks ago my grandfather impulsively bought some chicks from TSC as a gift, and when i mean some I mean 110+ baby chicks. I managed to figure out some of the chicks breed, but there were 3 that left me wondering. Here are the pics below.
1st chick
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2nd chick
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3rd chick
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And here's them together
View attachment 1738980

 

[Frazzemrat1]

What type of comb does #1 have?
#2 Wheaton Marans
#3 Is it already bigger than the others? It could be a Cornish x
In the group pic, second from the right, I think I also see a speckled Sussex in there.

 

[Purebreed]

Im sorry for the very late response, it was a chaotic week; work and family. To your first question, the chick has a single come; ill post a better picture. 3rd chick is a bit bigger but its most likely not a cornish x. Though it is a bit bigger it's mostly likely due to the chick being a male.