Complex sentence: During his film career, he was primarily an action star and was particularly famous for his macho appeal and as a stunt actor, well known for performing stunts of dangerous nature on his own.
Split into simpler sentences: During his film career, he was primarily an action star and was particularly famous for his macho appeal and stunt performance. He was reputed for his unique style and masculine image and well known for performing stunts of dangerous nature on his own.