I'm going to go solely with habitat animals for this (I could probably make a shorter list for exhibit species if I'm allowed to do so in this thread)
Africa:
1. Black Rhinoceros
2. Southern White Rhinoceros
3. Meerkat
4. African Leopard
5. Addax
6. Scimitar-Horned Oryx
7. Fennec Fox
8. Hamadryas Baboon/Olive Baboon
9. Red River Hog
10. Fossa
Asia:
1. Asian Small-Clawed Otter
2. Clouded Leopard
3. Malayan Tapir
4. Binturong
5. Northern White-Cheeked Gibbon
6. Przewalski's Wild Horse
7. Markhor
8. Proboscis Monkey
9. Blackbuck
10. Red-Crowned Crane
Europe:
1. Alpine Ibex
2. Iberian Lynx/Eurasian Lynx
3. Red Deer
4. Wolverine
5. Wisent
6. Barbary Macaque
7. Chamois
8. Muskox
(I don't have enough animals from Europe to warrant 10 slots, I only put the wolverine here because I'd prefer it in a Europe pack over the last 4.)
North America:
1. Moose
2. American Alligator
3. American Beaver
4. North American Cougar
5. American Black Bear
6. Rocky Mountain Bighorn Sheep/Desert Bighorn Sheep (I can't decide which subspecies I'd prefer, if Frontier wants to get specific)
7. Greater Roadrunner
8. Alligator Snapping Turtle
9. California Sea Lion
10. Walrus
Oceania:
1. Emu
2. Tasmanian Devil
3. Bennett's Wallaby
4. Common Wombat
5. Short-Beaked Echidna
6. Eastern Grey Kangaroo
7. Yellow-Footed Rock-Wallaby/Quokka
8. Matschie's Tree-Kangaroo
9. Little Blue Penguin
10. North Island Brown Kiwi
South America:
1. Capybara
2. Maned Wolf
3. Geoffroy's Spider Monkey
4. Black Howler Monkey
5. Ocelot
6. Spectacled Bear
7. Collared Peccary
8. South American Coati
9. Guanaco/Vicuna
10. Humboldt Penguin
There are of course other animals I want (especially in African and Asia) that couldn't make this list.