In Morrowind, you have to kill a ghost to please the Urshilaku, Dagoth Gares for the Sixth House Base, Dagoth Vemyn for Sunder, and Dagoth Ur/the heart. I guess you could probably cheese reflect spells, but that doesn’t feel quite “true pacifist” to me - just like dragging Eridor everywhere in Oblivion doesn’t quite feel like “pacifism.” You’d also have to do a lot of leveling/side quests to get the Hortator/Nerevarine skip to avoid the inevitable slaughter of Venim, Gothren, the bad Erabenimsim, etc (it’s annoying, Gothren stalled out my “no inventory” run and working on the skip took 5ever)

You could trade the ghost and Gares for Vivec if you wanted, and then not have to do the leveling/side quests.