It’s very rare to have a drake kill hens.If you have enough duck hens to keep the drake satisfied,all should be fine.I have kept at the most ten or more drakes with my hens (Never ten at once and they all had girls)and never have they ever had an issue with them breeding my hens or trying to kill.Most issues I see between them are my roosters and drakes not getting along.
At one point I had geese and one day I had an outcast gander flock together with my ducks and end up actually becoming apart of my flock.So yes,Geese,ducks,and chickens can be kept in the same housing,but remember ducks are much more nastier and messier then geese and chickens.However,you shouldn’t add all them at once.You need space and lots of feed and watering stations.And all these birds would need to be raised as a group,and peacocks require different things.I know turkeys and chickens can be kept together as well.
Geese and Swans I have heard are similar,Bad attitudes and overly territorial.Wouldnt put swans in period.And your not expecting all these animals to just get along are you?I have a small flock of 18 chickens and three ducks and not even they get along sometimes so I can only imagine what troubles you’ll have.
This requires lots of pens.I would keep Chickens turkeys and ducks as one and let the peafowl,swans,and geese have their own personal pens each.