Fang Xuanling (房玄齡) (579–648), formal name Fang Qiao (房喬) but went by the courtesy name of Xuanling, formally Duke Wenzhao of Liang (梁文昭公), was the lead editor of the Book of Jin and one of the most celebrated chancellors of the Chinese dynasty Tang Dynasty, and he and his colleague Du Ruhui, both serving during the reign of Emperor Taizong, were often asserted to be ideal models for chancellors.
Read more about Fang Xuanling: During Sui Dynasty, During Emperor Gaozu's Reign, During Emperor Taizong's Reign