More rainforest creatures, like sloths, tapirs, anteaters, peccaries, capybara, toucans, parrots, poison dart frogs, etc. Rainforests have amazing biodiversity that the fandom hardly ever sees, imho. More cool mermaids and aquatic animals designed like the zora. More herbivores and prey animals in general. Monkey and ape 'sonas don't bother me really and there's a lot of really cool species of monkey out there.
Oh man, more armadillos would be really cool too. and big things like elephants, rhinos, and hippos. Someone mentioned lemurs, those too.
Fewer... copyright species like pokemon, weird-ass hybrids, made up species like sergals (I'm definitely not on the sergal bandwagon), and of course foxes, wolves, cats, dragons, horses, etc.