The first one isn't an Easter Egger. EE's don't 'get' green legs, they have green legs from the time that they are hatched. They also have "puffs" of feathers on their cheeks. Besides, MM wouldn't put green egg layers in a brown egg layers assortment. Here is a picture of a couple of EE chicks I had last year-
Note the colors of their legs and the fluffy faces.
Your buff colored chicks look like Buff Orpingtons. I am not for sure about any of the other ones, but your black ones could be Black Australorps? And the red ones could be Rhode Island Reds, or New Hampshire Reds. The yellow chicks may be White Rocks... And the first chicks looks like a partridge something... partridge rock or wyandotte? Cute chicks BTW