According to the above information, the smartest person among the strange people in the world is Yang Ba.

Yang Ba is a character in Qing Dynasty novelist Feng Jicai's "Strange People in the World". He is known as "Yang Ba" because of his intelligence, wit and eloquence. He was very old when he appeared, but he maintained a young heart, quick thinking, flexible and changeable, and could always find solutions to problems in complex situations. He is proficient in medicine, physiognomy, divination and other skills, and once saved Zhang Dali's life. Yang Ba's intelligence and extensive knowledge are fully demonstrated in the novel, and he is considered to be one of the smartest people in the world.