Luigi Pirandello, Six Characters in Search of an Author Friedrich Durrenmatt, The Visit NOEL COWARD!!! (Blithe Spirit, Hay Fever, Private Lives, Design for Living, Present Laughter)
I have to second Thornton Wilder's The Skin of Our Teeth and Eugene O'Neill's Long Day's Journey Into Night.
Also, some modern 'classics': Proof, by David Auburn Doubt, by John Patrick Shanley Last Night of Ballyhoo, by Alfred Uhry The Last Days of Judas Iscariot, by Stephen Adly Guirgis
"Art is always in crisis: you must work fast to write in the breath on the window."
-Edward Bond
Angels in America Our Town (if you haven't already) The Matchmaker by Thornton Wilder <--- Hello, Dolly play! Know that? Pygmalian (Oscar Wilde?) The Curcible When Ya Coming Back Red Ryder? Mark Medoff (Read this in my Script Analysis class. M Butterfly - Imagine BD Wong! Buried Child - Sam Shepard (Freaky play! But good) Crimes of the Heart Mojo & String (Two separate plays. Samuel French.) The Piano Lesson The Good Person of Schezuan The Laramie Project Oedipius Rex Antigone The Winter's Tale - Shakespeare ... Just don't watch it being performed School For Wives - Moliere. Proof Dearly Departed Over Here! - Okay it's a lost musical that starred two of the Andrews Sisters, John Travolta, Treat Williams, Merilu Henner, and of course ... Ann Reinking! Good show... NO GREAT!
I guess Script Analysis class really got me reading.
Arcadia The Crucible The Kentucky Cycle The Birthday Party The Real Thing The Goat Waiting for Lefty The Twilight of the Golds Les Liaisons Dangereuses Fifth of July