by Mike Krumboltz Darth Vader is such a powerful icon, it's not surprising that it took three actors to portray the character in the original " Star Wars " trilogy. James Earl Jones did the voices. Sebastian Shaw 's face was used in the closeups during the end of " Return of the Jedi ." And David Prowse was the guy walking tall in the black suit and helmet. Mr. Prowse does have an important place in "Star Wars" lore,