About the roosters.... at 4 weeks it may be too soon to tell if they are truly cockerels or not. You may have to wait a while, but it's not uncommon to find yourself with too many.
You might consider rehoming one or more as soon as you're certain they are males.
I bought 12 pullet chicks and 3 ended up being cockerels. At 5 months of age it's causing me problems.
My top roo Red Rider is very good with the girls and very alert and protective.
I have Cocoa that gets caged in the coop at night because he cannot get along. Pearl gets along okay, as long as he leaves the girls alone, but is keeping some hens from the nest boxes. Both of these guys get put out in the yard during the day and they keep to separate areas for the most part. Cocoa beats Pearl up if he gets a chance. And Cocoa gets beat up by Red Rider if he goes near the girls.
So... I've offered Cocoa to a friend for the stew pot. Pearl, for now is getting a pass, but I'm keeping him out of the hen house during the day.