Anyone Can Die/Theatre

Many of the tragedies of William Shakespeare: Macbeth, Othello, Hamlet (which qualifies for Kill'Em All), Romeo and Juliet, Richard III, etc.
Even the Narrator in Into the Woods.
In The Insect Play, several insects meet untimely demises, not counting the ant war of the third act which ends in a general massacre. In the epilogue, the Audience Surrogate sees the moths happily dying one by one, and then finds that it's his turn to die.