My quail are in an aviary and I have one dove in it too. They dove seems to really like and get along well with the quail. It spends most of the time on the ground, laying in the excelsior and even bowing and cooing at the quail. I also have doves I have hatched with mama and dad in a smaller aviary but surrounded by free-range chickens. Now that the offspring are out on their own they still come and spend the day in the yard with the chickens, without any issue. When I was raising quail and they happened to be about a week old I had to put two baby chicks I had to rescue from a mama hen who was not caring for them. They were only about 2 days old and they grew up with the quail, again no problems. All got along very well so it is possible. Id keep a close eye out for the first few hours of putting anything new into the aviary with the quail. For instance, I have fantails in separate cages but inside the aviary.Yesterday I let two of them out of their cages and into the aviary to run around together and take a water bath. I stayed with them most of the time until I returned them to the cage. I wouldnt want to take a chance of anything happening to the quail.
I havent had any experience with pheasants but Id think that it all depends on how and when the introductions together happens as to if the outcome is favorable or not.