Opossums are perfect trans fursonas! They've got that chaotic vibe like raccoons, and also there's a bit of "society may not always appreciate them but they're actually super rad and adorable" which is pretty relatable.

Also sharks. Blahaj go brrr.

Maybe protogen, not sure why that comes to mind. Seems to be common with sharks too. Hyena seems likely too for some reason, maybe because of the inversion of traditional gender roles.

I would say that a fursona species that would have heavy vibes with trans people would be species capable of shapeshifting. My fursona is effectively an anthropomorphic version of the feline shape-shifting Pokemon known as Mew, but specifically the shiny form.

Clownfish

Can confirm, my fursona is a raccoon

Follow up of me mentioning clownfish. Here is an explaination of this fishes biology: https://australian.museum/learn/teachers/classroom-activities/sex-change-in-clownfish/

This is probably confirmation bias, but almost every housecat I know is either a trans woman, a feminine-enby, or a femboy. Definitely a strong feminine streak there.

gonna second hyenas to the person who said that earlier, I think I've interacted with like 5 yeenbys by this point (and me too actually)