Welsummers and crested cream legbars do well in hot and cold weather as long as your ventilation is adequate.
(I have both and none of my extra large roosters have ever harmed them.) I love naked necks and they do well in our hot weather and on the rare occasions we drop below zero they've done...
It depends on your roosters and their personalities.
In my main flock, I have 3 adult roosters, 34 hens (27 hens are standard size), 4 cockerels (7 months and older), 9 pullets of laying age, and a few chicks. They all run together and roost in their choice of 4 coops.
My head rooster (a...