One of only a handful of named sentient species to originate from within the original Marvel Star Wars comic run who, while technically recurring, has seldom appeared in anything since...
Frigosian
One of the most unique named sentient species to come from The Force Awakens, the Frigosians have already proven fascinating and ripe for future exploration!
Kerestian
This species went from mindless predatory creatures to a sophisticated civilization to post-apocalyptic barbarians before ever even being discovered by the outside galaxy.
Hethas
There are few more obscure named and pictured species from the EU, only having appeared in a total of 2 pieces of media, and given no homeworld, coloration, or really any other lore!
Jeby
One of the most unique and creative sentient species in the entirety of the Star Wars franchise, originating from the imaginative brain of one seven-year-old fan in 1996!
Kynachi
This almost Human-passing species is really only distinguished by their golden hair, which itself was only present if they exclusively lived on a diet of foods found on their homeworld.
K’aarg
The K'aarg are an incredibly obscure yet fascinating species, whose only appearance is relegated to a scenario within an issue of a 1997 French roleplaying game magazine that is nearly impossible to access for most Star Wars fans today!
Sabat
A little-explored species who seem to have a vendetta against the Empire, though that may just be due to a number of their species coincidentally joining various rebel cells.
Jin
A little-known species who were nearly wiped out by the Empire, but who also came back with a fury to help eventually take down the tyrannical regime that had once driven them to near extinction.
Icarii
A fascinatingly unique species who had the unique ability to survive dismemberment and decapitation, though whether this is due to their distinct biology or their connection to the Force remains to be explored.