To find the area of a pentagon, I would split the figure in 2. Find the area of the base (trapezoid) with A=1/2 (b1 + b2) × h, and add the area of the top (triangle) with A=1/2 b x h.
1st pic:
Top: Brown Leghorn (white earlobes?)
Right: Rhode Island Red or production red
Middle: Silver Laced Wyandotte
Second to bottom: either a New Hampshire or rhode island red
Bottom: black sex link
Black ones are probably Australorps (pink/black legs) or Jersey Giants (yellow/black legs).
I'm not sure it's a cockerel. It could just be a pullet that matures earlier than the others. I have had some of those. Plus I don't see any male saddle feathers yet. I would wait a few weeks to see how it matures.
Edited to ask: How long has it been red? Since it was young or just in the...
If you are sure about age it just means she is getting close to laying. Orpington roosters usually have double the comb and wattle of yours at that age. Plus add to the fact that your chicken has rounded saddle feathers, I vote pullet.
Google pics of buff chanteclers - they look just like what you have. Meyers only have buff chanteclers and buff orpingtons. They don't have buff wyandottes or buff rocks. So my guess is buff chantecler.
Your silver laced Wyandotte looks like a cockerel to me. I'm on the fence about your easter egger though. Could you get a comb/head shot like you did with you're Wyandotte?
The only ones that look like easter eggers to me are the orange ones. The others look just like my blue and black ameraucanas (pure). But I could be wrong.
I say roo as well. Mine was sexed as female but he was lacking the black edging on his back that the females had. He looked exactly like yours and also feathered in just as fast as the females.