Man the sight is lagging bad…
There are better evil faces and better neutral faces...This is what I would personally do for the two sides of the coin.

A being the more neutral, toned down choice and B being the more sinister "evil" one.
You mentioned the appearance of intelligence; I would think both of these faces would work for that. Choice B would, to me, seem like the overpowering, cocky type while choice A would seem more like the more modest genius.
Prophecies doesn't give you much to work with does it?