Was it Samir Bannout?
MuscleMemory is, you know...
Samir Banout lost to Lee Haney in 1984, then lost again in 1988, 1989, 1990, 1991, 1992, 1994
Frank Zane lost to Arnold Schwarzenegger in 1980 (well, at least officially), then again in 1982, 1983
Sergio Oliva lost to Arnold Schwarzenegger in 1970, then again in 1984, and 1985