WordNet (r) 3.0 (2006):

role player
    n 1: a person who makes deceitful pretenses [syn: imposter,
         impostor, pretender, fake, faker, fraud, sham,
         shammer, pseudo, pseud, role player]
    2: a theatrical performer [syn: actor, histrion, player,
       thespian, role player]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "role player":
   Artful Dodger, Casanova, Don Juan, Machiavel, Machiavelli,
   Machiavellian, actor, bamboozler, befuddler, beguiler, charmer,
   counterfeiter, deceiver, deluder, dissembler, dissimulator, dodger,
   double-dealer, duper, enchanter, entrancer, faker, fooler, forger,
   gay deceiver, hoaxer, hypnotizer, jilt, jilter, joker, jokester,
   kidder, leg-puller, mesmerizer, misleader, plagiarist, plagiarizer,
   playactor, practical joker, ragger, seducer, spoofer, tease,
   teaser