PEOPLE who complain that we have so few biographical facts about Shakespeare, and use that lack of data as an excuse for indulging in fantasies about who "really" wrote his plays, should ponder the case of Christopher Marlowe (at one time a favorite candidate for that ghostwriter role), about whom even less is known. He flashed across the Tudor literary scene for a stunningly brief period, raising the standards of poetic achievement and transforming Elizabethan theater. Few pre-Shakespearean English plays still hold the stage; they include at least four of Marlowe's. In recent decades, "Tamburlaine the Great" (its two parts usually condensed into one evening), "The Jew of Malta," "Doctor Faustus" and "Edward II" have had regular revivals.