as a prior caricature artist myself, I'd say that you could also push the likeness to the Leonidas character from 300. I can tell it's him, because I recognize the scar and the hair style, but the facial features aren't necessarily spot on with likeness. consider the shape of his nose and the already outrageous pointiness…
Haha that's kinda cool!! You could certainly push it even more tho!! At the moment it reminds me a little of those oversized halloween rubber masks of politicians. Since you have the freedom of 3D ... you could go so much further! Maybe try to think him as a character out of Disney's Mulan. See how the features could be…