I think Spock and Jim in Star Trek TOS have some extremely strong aro vibes.
I mean they are in a canon QPP. Jim Kirk is pretty much pansexual, and Spock...well he is an alien, with quite different standard behaviours and ways of expressing himself. They are friends in an exceptionally intense way, as Gene defined it, they are each others t'hy'la. That means something along the lines of a "friend/brother/lover" type of relationship in an extraterrestrial alien culture. Anyway, I think it sounds a lot better than zucchini...though I have no idea how to actually pronounce it
Also, Katniss from the Hunger Games. Okay, she totally has PTSD-related things as well, but I think she isn't really romantically into any of those two guys.
The Doctor from Doctor Who, he/they are soo ace, and mostly aro too, depending on what regeneration. There is quite a bit of more or less canon material that supports the theory.