Shamit from BSS was wondering on Twitter the other day what the absolute prime fit with Zion would be from a guard, and he basically comes to the conclusion that it would be a solid passer but more importantly, someone who would be nuclear as a shooter off the dribble. The kind of guy who you are forced to trap or blitz at the screen, or risk getting fried. Examples he gives are Lillard or Kemba.
I do think there's a lot of truth there. Jrue's defense is absolutely important and I think a lot of people overlook it way too easily, but it seems fairly clear that in terms of offensive fit, a dynamic off the dribble shooter like a Lillard would be better.