Ooo, good point. I've got a bad 3D likeness of Jerry Seinfeld if you need it. I know that sounds funny but I actually do 
Okay, send that to me, it's hard finding free models of recognizable faces that I can work on
For a scale/detail test, I downloaded the voxelization and schematic conversion programs and after much hassle got them working...
I started with this model I was able to download for free, converted it

into this imported with mcedit

That's just about at max height to give you a sense of the level of detail we can get. It would be good to see if an actual face is more or less recognizable after the process