Possible Clues:

• “A Delicate Balance” playwright
• Winner of three Pulitzer Prizes for Drama
• "Seascape" dramatist
• Theatrical Edward
• ''Three Tall Women'' dramatist
• Pulitzer-winning dramatist
• "A Delicate Balance" Pulitzer playwright
• 'Three Tall Women' playwright Edward
• Dramatist takes vestment with ease, by the sound of it
• “The Sandbox” playwright