IMO would be reasonable to rule out EE influence- lacking any of the usual traits- beard, pea comb, didn't come from colored eggs, legs are yellow... just too many coincidences to be all lacking at once.
The one hen with strange comb could be from a line of repeated rose comb bred to single comb. When that's done, sometimes the rose comb dramatically changes and varies in appearence including some with a mostly single looking comb with a strange rose combish small part.
Was tempted to guess pencilled or partridge rock as part of her mix but the rose combs makes me lean to wyandotte mixed with not-wyandotte.. especially as the other one has a clear rose comb. The reason for thinking pencilled/partridge is because she has faint, incomplete pencilling on her feathers however pencilled or partridge or even laced wyandotte still can be a reasonable guess as if the birds are not pure for the necessary genes for pencilling, partridge, lacing can and will produce similar markings on these two and also the slight half moon spangling on her sister's breast. If those two were bred to something single laced, most likely there would be a lot of offspring showing clearer but still incomplete pencilling, single and double lacing.
One is showing darker red tint so perhaps some RIR influence, the other one is more golden, perhaps gold laced was in the mix also. This mix would explain the clear yellow legs as well. Welsumer could work as well they do have a gene that darkens the brown tones to the feathers- the dark egg trait is easily lost through crossing.
Third one looks like a sebright mix to me- that dark upper neck feathers, slight darkness to her facial skin, and long tail does show up in sebright cross/mixes. Especially if her skin is flesh or white(if soles are white, she has white skin- which sebrights have)
