Alphabetically, I'm thinking this list seems pretty definitive...
Angels in America by Tony Kushner The Crucible by Arthur Miller Death of a Salesman by Arthur Miller Fences by August Wilson The Glass Menagerie by Tennessee Williams Long Day’s Journey Into Night by Eugene O'Neill Our Town by Thornton Wilder A Raisin in the Sun by Lorraine Hansberry A Streetcar Named Desire by Tennessee Williams Who’s Afraid of Virginia Woolf? by Edward Albee
These are just a few of my favorites, which tend to be a little different thing because the "greatest" plays tend to be what can be re-produced or re-staged. Some plays are odd like Bug is a very great written play that imo can't be staged well (not the film either), so its stuck in some weird in-between world.
Your list pretty much nails it for the big plays - I do think August Osage County and How I Learned to Drive are modern plays that will start appearing on the list more as the years go by.
True West, by Sam Shepard American Buffalo, by David Mamet Glengarry Glen Ross, by David Mamet The Zoo Story, by Edward Albee Orphans, by Lyle Kessler
February 27, 2017 at 12:06 : distain (pupdurcs) posted on Gold Derby:
One can write a list just featuring Tennessee Williams, Arthur Miller and Eugene O’Neill, so I’ll limit my list to one play per person.
Angels in America (Tony Kushner) A Raisin in the Sun (Lorraine Hansberry) A Streetcar Named Desire (Tennessee Williams) The Crucible (Arthur Miller) August: Osage County (Tracy Letts) Fences (August Wilson) The Iceman Cometh (Eugene O’Neill) Glengarry Glen Ross (David Mamet) True West (Sam Shepard) Who’s Afraid of Virginia Woolf? (Edward Albee) *
I hate Edward Albee, but I suppose Who’s Afraid of Virginia Woolf? is undeniably important.