I agree with the rules for the pairings you mentioned
I think 2 is enough of a representation.
I agree on elephants, tortoises, tigers, rainforest antelopes, foxes, hippos, rhinos, monitors and lemurs.
I wouldn’t put sheep and goats on the same pairing.
when it comes to wolves, there’s arguments about the Timberwolf representation over subspecies. I don’t necessarily pair them with Arctic wolves but 2 wolves is enough (personally I’ll take any Wolf any day).
I guess 2 suidae is enough but I’m still rooting for red River hog and peccary.
I would like another type of pinniped, but eared and non eared are very different so I wouldn’t pair California and grays. Maybe walrus (toothed seal) and the fur seal (which looks and acts like sea lions but is called seal)
I would say we have enough brown bears. The Taiwan black bear and sun bears are still very different. No comparison to polar bears.
While mandrills are their own monkey group, I would consider them the “big monkey” of Africa while Japanese macaques are the small monkey of Asia. SA doesn’t have any “big monkey” in game and africa doesn’t have a “small monkey”. While their biomes are different my opinion differs.
I would say one big penguin and one small penguin is enough and from different continents.
So when it comes to deer. While moose are deer, no other deer comes close to being a paired. Reindeer/caribou feel more like their own thing. Therefore I consider the fallow deer to be more of a basic deer. Maybe elk can be added one day or another simple deer species.
I wouldn’t call chimps and bonobos a pairing but I’d say they are 2 of the 4 that complete to great ape check off list.
now for potential pairings
I agree with the camels, badgers, flamingos, horses, wallaby and hyenas.
Idc about wisents. The lynx is tricky as they all live in the same biomes and continents, therefore another lynx wouldn’t sound as interesting. I’d say any small otter would work as nothing is comparable to giant otters or sea otters. While giraffes would have their difference in appearances, I’d see them more as a reskin. Okapis are the only small giraffadea member so no pair.
I’d consider the Emu and Rhea more of a pairing even though we don’t have either.