#8. Wilt Chamberlain
The basketball legend had the size (7'1") but not the acting chops to play bodyguard Bombaata in the 1984 flick Conan the Destroyer, the second film to star body builder ArnoldSchwarzenegger as the sword-swinging hero. Wilt the Stilt looked awfully small when it came to acting talent. (Photo: Getty Images)