The Columi.
They were one of the most technologically gifted of the Firstborn and quite possibly the first to establish a basic technological Earth-tier society while many other species were still crawling out of the mud (or so they claim). They (along with a rival species) were the fathers of technology, being the creators of the first computers, the first real droids and the first primitive starships, they may have even invented some of these things before the Gree. But what is certain is that they are the fathers of Droids, a technology they would sell to others at insane prices. As they were the first to achieve space travel (without hyperdrive or hypergates), they were the first to see the early galaxy, and suffice it to say
THIS was their reaction... Every planet that was close enough to their own was a piece of crap in their eyes. Planets were either uninhabitable, had gravity that was too much for their puny asses and every species they came across was a dumbass caveman in their eyes unworthy of their
big brained conversations. So the disappointed Columi went back home and
they became galactic NEETs and circlejerk'd each other from then on. They were so disgusted by their neighboring worlds that they swore to never do physical activities again, seeing it as the thing of barbarians, instead dedicating themselves to mental activities and having their droids do all the work, like taking care of them or taking resources from other planets. After countless centuries of this, their bodies shriveled up and they became true big brained arch-fedoralords. They also apparently had some sort of tie to certain galactic demons like the
Molators of Alderaan and even
Cacodemons (yes you read that right, Cacodemons are a thing thanks to the Columi). Either that or people saw the Columi to be just as fucked up as demons.
When the Gree finally showed up, the Columi told them and their hypergates to fuck off (but they stole their hypertech anyway and claimed they invented it and used it to steal more shit they took credit for). Then the Celestials decided to intervene to warn them about the Twilight Wars, the Columi were pissed at finding out creatures better than they existed, so they closed their planet off completely, never leaving their safespace again, and no one would talk to them because they were assholes, but they then decided to take credit for what the Celestials did because why not. Because of this, they gained a closer affinity with their droids than other sentients, to the point where Columi developed the ability to control technology with their minds. Despite their isolationism, they would still trade goods with the rest of the galaxy simply because they saw any tech they traded away for some galactic porno as leftover garbage that would please the "stupids" of the galaxy. Thousands of years later the Empire showed up to conquer them, but the Columi gave them sweet new tech and a few dumber Columi to help them with their science in exchange for leaving them the fuck alone. After the fall of the Empire and the Vong, they also toyed with the idea of conquering the Galaxy with their own slimy shapeshifters which they made using technology they stole from the Vong.
In short, they were cold and calculating super geniuses who invented the first droids, they were also lazy as fuck and were effectively the FIRST ASSHOLES. Honestly my favorite species.