While the Clabronians are Canon, we haven’t seen much of them yet, although their stance against war could be quite an interesting facet to explore.
Halaisi
Based off of the original concept art for Mace Windu, the Halaisi have existed for a sizable amount of time, however they have just now finally been identified!
Boosodian
Sporting a whopping 20 eyes, the Boosodians could see much more than the average species, both directionally and on the electromagnetic spectrum.
Irrukiine
What in the galaxy is more intimidating than a giant, four-armed, two-torso, Dark Side magic fueled lupine?
Kubaz
With an extensively mapped out history and lore, the Kubaz loved espionage, hated sentient Insectoids, and just wanted the chance to develop their own hyperdrive technology.
Daltarri
The Daltarri had a very unique design, being one of the few sentient plant species to appear across both Canon and Legends.
Peripleen
The Peripleen were one of the few species to be considered both a simian and a reptilian, but even more interestingly, the limit to their long lifespans were never actually revealed.
Mordageen
Somehow fairly humans-like and not really human-like at all, this seldom explored species is in need of some expanded lore that will probably never happen.
Glymphid
Based on the real life Gharial, this slender reptilian species has an incredibly unique design, but not so incredibly unique lore to match it... yet.
Praxeum (Ending #2)
A unique Star Wars tale about the fall of Almas Academy. There are 2 separate endings to this short story, although reading #1 before #2 is preferred.