My pick is Hozuki from Hozuki's Coolheadedness or Hozuki no Reitetsu He is very stoic and serious, rarely losing his cool under almost any circumstance, he's highly skilled in a variety of arts inluding the brewing of herbal concoctions, rearing goldfish plants as well as combat. His management and organization skills are also impeccable and he's the number 2 man in hell! emotion_yatta