Who created the fictional superhero as whom Karl Pruner did voice acting in the short-lived animated series "Silver Surfer"?
Karl Pruner:  Amongst his other work, he did voice acting as Beta Ray Bill in the short-lived animated series "Silver Surfer". Beta Ray Bill:  The character first appears in "Thor" #337 (November 1983) and was created by writer-artist Walt Simonson.
Walt Simonson