I think you've already gotten most of the answers I would have given.
I wouldn't necessarily write off the geese. I can say that different flocks are different. I raised Africans and Chinese alongside chickens and ducks before. They all had separate night quarters, and I fed them all separately, but they ranged the same pasture area. It was very large and they mostly kept to themselves. I never had any major issues. One Indian Runner drake terrorized my first batch of goslings, and they remained afraid of him long after they grew much larger. And one day a hen apparently made one of the geese upset and the goose latched on and refused to let go. I had to release the hen, and she wasn't injured (beyond losing some feathers).
I have a MUCH larger area here, many fewer chickens (less than 20 ATM), no ducks, but the llama and the goats are in the main pasture, and two flocks of geese. My geese are mostly Emdens, and some Pilgrim and Toulouse. Everyone got along fine until breeding season. The geese started attacking the goats, so I quit letting them in the pasture. Really, there have been very few problems between the chickens and geese. The geese bully them at times, but the only problem was when a chicken wandered into the setting goose's coop and was trapped there. The goose called for reinforcements, two ganders responded, and the chicken likely would have been killed if not rescued.
But except for separating the geese when they had goslings less than a month old, no special precautions were needed. Now that the goslings are about two months old, that flock is back in with the goats. The pasture is about an acre and a half, so they mostly keep distance. When the geese want to hog the main watering area, they chase the goats away. Oh, I have a broody with three chicks I've been placing in the pasture every day too. No problems so far there either.
As for aggression, for the most part it is controlled, even during breeding season, by facing the geese (don't turn your back!), being confident, moving slowly, not disturbing them unnecessarily, and I started up again carrying the white pole I used to herd them (as an arm extender) when they were goslings. I did get bit once this year, by my Pilgrim in fact, when I turned my back and wasn't paying attention to him.
The Pilgrims are wonderful parents. Toulouse is good too, and the most docile of my breeds. I don't have a Toulouse gander though. The Emdens are pretty fair parents too, and along with Toulouse, a larger-bodied bird than the Pilgrims.
I just love geese. They are fun to watch, the babies are cute, the meat is good (honestly more like a red meat than poultry) and they produce a lot of good grease. They keep the grass short (which I don't have a problem with anyway, but helps some), don't need much in the way of feed, are less vulnerable than chickens (I lost most of my chickens to hawks, snakes, and cats -- none of which bother the geese), and are very alert to danger. They spread a lot of fertilizer too, and are very hardy. I'm also thinking goose-down when I process this year's goslings.
I have nothing against turkeys. In fact, I really want some! But I've raised geese for several years now, and have learned to really appreciate them a lot.
