Knights of Tezoth

I don't know Tann, but Tartarrus was something of an unstoppable death machine. Though honestly, I doubt Reven will bring Lavina back — his story ended on a happy note. More likely candidates seem to me to be Vergilius (which would be sad, given the tie-in with Ghoul) or Ludovic Alvarez (a proto-Tiarius who turned out to be far more successful than Tiarius himself).