All your herbivores should be fine together. Since you're going for Africa-centric that list looks okay except what's already noted (the anteater). The mains thing with just putting any animals from a continent together is:
1 Nothing should trigger the predator/prey system. That is, most carnivores aren't going to be kept with other carnivores, much less any herbivores. There are a few exceptions and some things I'm not sure on. The meerkat might be okay, and the fennec foxes are fairly small so may not trigger the predator/prey system for larger herbivores. Primates are a bit more complicated, some species are a bit more aggressive than others and I'm not sure to what extent they're coding in the predator/prey system.
2 To a lesser extent, even if the animals are all from the same continent, they will have different terrain and biome requirements. But, there's not a need to hit those perfectly and can definitely have some room to get most animals in a comfortable zone for those. Plants in particular, the larger the coverage the higher the hit it makes on their welfare, but even with that, it's not very high. Terrain does get a little trickier though but I think in Sandbox it would not be a worry.
3. Final "thing". enjoy your return to PZ and good luck on your habitat!
