There are actually a couple more species with 50% healers (and there's the Kacheek's, which is unique):
Here's the whole healer list my friend made, which may be slightly out of date now:
Species Without Healers Who We Pity
Acara, Aisha, Bori, Bruce, Buzz, Chomby, Cybunny, Draik, Eyrie, Gnorbu, Grarrl, Grundo, Hissi, Ixi, Jetsam, JubJub, Kau, Kiko, Koi, Korbat, Kougra, Krawk, Kyrii, Lupe, Meerca, Mynci, Ogrin, Peophin, Poogle, Pteri, Quiggle, Skeith, Techo, Tonu, Tuskaninny, Usul, Wocky, Xweetok, Yurble, Zafara
Species With Beneficial Healers But That May Be A Little More Rare Than Necessary As I Didn't Check
Blumaroo (50%), Elephante (50%), Gelert (50%), Kacheek (33%), Lenny (50%, also have a 10 HP one), Nimmo (50%), Shoyru (50%, also have a 15 HP one), Uni (50%, also have a 25 HP one and a 10 HP one)
Species With Healers That Are Grotesquely Rare/Unreleased Or Are Too Low To Matter To Anyone, And Who For The Love Of Benji Should Get Some Buffing And Shouldn't Be Assumed In The Has-Heal Category If More Species Get Healers
Chia (12 HP), Flotsam (too rare for stats to be known, assuming it's even a healer and not a freezer or something), Moehog (5 HP), Ruki (too rare again), Scorchio (20 HP)