Louis VI of France
He would spend most of his 29 year reign fighting and even though in his later years he became very fat and heavy for his horse to carry, he was still active in battles. His got his nickname "the Fat" because of how fat he was. But because he was very active in fighting, he also got the nickname, "the Fighter". Louis died in 1137 due to dysentery at the age of 57. He was succeeded by his 17-year-old son, Louis VII.