That is a very difficult question to answer. I have several poems that I hold dear. Two are by Edgar Allan Poe:
Also, Rainer Maria Rilke's Corpse Washing
But I stumbled on one a few years ago I stumbled on a poem by C. David Hay, called "The Cemetery" It's not available online. Since I don't want to violate copyright, I'll just give you a few lines of this sixteen line poem:
Cold are the whispering winds that blow
Past chiseled marble--row on row.
Silent specters aglow in the night
Like sentries frozen in after light
Guarding the bones of those beneath--
Dust and ash be their bequeath.
Yes, I admit it. I do like a bit of the macabre in my poetry.