R2elk hit on a very important part.. DO NOT KEEP GUINEAS IN COOP with CHICKENS DURIN GBREEDING SEASON!
It's unrealistic for me to have a 2nd coop just for guineas all summer long, so that is not going to happen...
My guineafowl, peafowl, standard and bantam chickens all share a coop together all year long, grand total over 100 birds and for the most part they get along just fine, no real difference during 'breeding season' that I notice... As I said the only ones that get picked on are the pompous and showboating roosters, even my bantam roosters get along with huge standard roosters and the guinea males... Peafowl pretty much keep to themselves but they do interact and roost together with the other birds on occasion...
I'm guessing dynamics is going to be largely based on several factors unique to each location... And I believe available space is going to play a huge part, if the space in small and they different breeds are forced to interact and rub shoulders you will likley have more issues than if they have room to form their own niches in the coop and run and mostly keep to themselves...