http://movies.yahoo.com/news/movie-sword-fight-master-bob-anderson-dies-89-122704485.html he kind of looks like vader with the helmet off.
It was the swordsman who did the fight scenes as Vader that died -- the guy who *was* Vader (ie credited & non-fighting scenes) is David Prowse, whom I believe is still alive and force-choking idiots everywhere. Yes, I am a SW geek, I admit it.