The only NPC I can think of right off who you aren't expected to fight but who I really want to kill is Ranis Athrys. Such a vile, spiteful woman....
She is the reason I always go up the stairs outside of the Balmora Mages Guild and enter in where Galbedir is....and exit the same way....(when using the Mages Guild travel agent, of course).
I like to avoid Ranis Athrys at the door.....she typically says mean things to me, *sniff sniff*, and I steal the stuff in the chest on the way up the stairs, and sell it.
I rarely do the Mages Guild anyway.
She is the very definition of "S'wit"!