In reply to ThunderCat:
> I believe there were three people involved in Vader. Dave Prowse aka the green cross code man for most of the scenes, James Earl Jones for the voice, and another guy for the fight scenes.
The stunt man for Prowse in the light sabre duels in episodes V and VI was the production team's sword-fighting choreographer Bob Anderson. The story is that Prowse kept breaking the prop light sabres.
Are you forgetting Sebastian Shaw, who Dave Prowse was (allegedly) p*ed off to find played played the character under the mask at the end of Return of the Jedi? Although Shaw was billed as playing the role of Anakin Skywalker, since we only see him after Vader has "redeemed" himself by killing the Emperor.
And that's only in the original trilogy. Wiki has a lengthy list of actors who have portrayed Darth Vader/Anakin Skywalker, either in person or as voice actors:
https://en.wikipedia.org/wiki/Darth_Vader
Post edited at 13:53