Answer: Daley Thompson
Daley, or to give him his real name, Francis Morgan Thompson, was rarely seen without a smile on his face. In the 1984 competition, he set a world record that stood until 1992. He was the first decathlete to attempt three successive Olympic titles, but failed in 1988 because injury kept him down to fourth place. He was the first person to hold the Olympic, Commonwealth, World, and European titles in a single event at the same time. In major competitions, between 1979 and 1987, Thompson was never beaten.