Hear me out:
Fulgora
Friendly
They are what remains of Fulgora's ruined civilisation, because they evolved past the need for bodies or buildings
They can be befriended
They think that lesser life forms are adorable (this might include the engineer), and can be brought to other planets after a modicum of persuasion (but only one at a time, they don't like each other)
New buildings: "Overseer Tower" on the surface and "Overseer Cabin" on platforms (maximum of 1 per platform and Vulcanus sector, and not very overlappable radii elsewhere)
Given a new residence, our thoughtey new friends will use the high vantage point to study the local wildlife, pacifying meanies in a large radius on Nauvis and Gleba using their potent brain waves (raiding party? more like pick-nick party!) and preventing the big meanie of whichever Vulcanus sector they are placed in from aggroing (but it will still perform its patrol, incidentally destroying whatever it happens to run over)
Also super useful to prevent the fallout from eggs hatching where they shouldn't
Implement the floaty brain thingies
Moderator: ickputzdirwech

