1. Hamlet by William Shakespeare
What doesn't this tragedy have? There's sublime poetry, rich psychology for characters of both sexes, a hefty dose of comedy to leaven the mood, and, depending on a director's interpretation, a crackling good mystery lying underneath the tale of "The Melancholy Dane." Shakespeare took a standard-issue—for the period—genre and used it to create a monument in Western literature, dramatic or non. This play can be debated and dissected ad infinitum.