User blog comment:AnotherRho/Favorite recurring NPC (non-squad mate)/@comment-24.246.176.177-20120619202210

Hmmmm... for sheer kicks and giggles Conrad Verner is my fav (Sorry Khalisah, you're a close second though).

Though as far as more developed characters go it'd have to be the Illusive Man for me, with Kai Leng coming in as a distant second.