The Culture: individualist, materialist, pacifist
The Zetetic Elench: xenophile, materialist, pacifist
The Affront: fanatical militarist, xenophobe
The Idiran Empire: fanatical militarist, spiritualist (I don't know which to make fanatic?, its been a while since I read those particular books)
....
From what I understand spiritualist doesn't literally mean spiritualist. It can mean ideals.
I don't think so, all the ethics are ideals, spiritualist means...spiritual. It can be new-age style or Abrahamic style or something else, but it doesn't mean ideology in general
(my knowledge of 40k is a bit sparse, but based on what I do know, I would say)
Imperium: fanatical spiritualist, xenophobe (if i had to leave out one it would be militarist, and they seem to be less fanatically xenophobic than they do fanatically religious)
Tau: xenophile, collectivist, materialist
Eldar: spiritualist, xenophobe, collectivist(?)
Necrons: fanatical xenophobe, materialist
Orks: fanatical militarist, spiritualist (I mean they are religious, and have warp powers, it sort of works)
....
United Federation of Planets: materialist, pacifist, xenophile
Galactic Empire: xenophobe, collectivist, militarist
The Ethereals (XCOM): fanatic collectivist, spiritualist
The Covenant: fanatic spiritualist, militarist