Who is your favorite "completely unsympathetic" FE villain?

It's probably Izuka for me. While he's not QUITE the most hateable villain (Lekain from the same games is even worse, for example), his experimentation on Laguz and, in the case of "Bertram", Beorc, is some of the most vile stuff any villain has done in this series.

He's also just really enjoyable, between his manipulation of Pelleas, total insanity, confidence in the "worth" of his Feral One experiments, and the sheer satisfaction of killing him with characters like Pelleas, Volke, Zihark, Tibarn and Ranulf.

The fact that he's the last enemy before the Endgame Chapters makes him a bit more memorable too.