If you can give a list of what breeds of roosters and hens you have, I could probably rule out some of the options. For things like EEs, photos can help too. (Figuring out the parents can be fairly simple with a small flock, but difficult or impossible with a really large flock.)
For that chick with the rose comb:
I am expecting at least one parent with a rose comb (or possibly a walnut/cushion/strawberry comb.)
I think I see blue in the feathers, so I am expecting one parent to be blue or splash, or possibly white (because white can hide blue or splash.)
I see gold in the feathers, so I am expecting the father to have the gold gene.
The feathers seem sort-of laced, so I am expecting to see some kind of pattern in the feathers of at least one parent and maybe both.
My expectations may be wrong, but those are some of the traits I would be looking for.
With a Barred Plymouth Rock mother, you might have a sexlink there, depending on what genes the father has. If the father does NOT have the gene for white barring, then the barred chick would have to be a male. But if the father has, or might have, white barring, then the white barring on this chick does not tell us what sex it is.