1. If the enclosure is big enough, it should work with the exception of gazelles. They are very shy.Here are some of my ideas:
1.Reticulated Giraffe, Plains Zebra, Common Ostrich, Blue Wildebeest, Sable Antelope, Helmeted Guineafowl, Thomson Gazelle, East African Crowned Crane (Has Creep holes in exhibit )
2.American Bison, Pronghorn, American Elk
3.Indian Rhino, Gaur, Nilgai, Blackbuck, Barashinga
4.Brazillian Tapir, Capybara, Greater Rhea, Giant Anteater
5.Scarlet Macaw, Blue-and-yellow Macaw, Military Macaw, Toco Toucan, Green Iguana, Common Squirrel Monkey
2. Pronghorn doesn't exist in captivity, so it shouldn't work.
3. If the enclosure is big enough, it should work, but Nilgai bulls should attack other species, so I would recommend a female Nilgai group.
4. Should work.
5. Squirrel monkeys occasionally eat eggs, so it isn't a good idea.