Samuel Taylor Coleridge.
 Why? 
 The whole first half of the Rhyme of the Anciant Mariner, including some of my favorite verses:
"And I had done an hellish thing, 
And it would work 'em woe: 
For all averred, I had killed the bird 
That made the breeze to blow. 
'Ah wretch!' said they, 'the bird to slay, 
That made the breeze to blow!' 
and 
The very deep did rot: O Christ! 
That ever this should be! 
Yea, slimy things did crawl with legs 
Upon the slimy sea. 
About, about in reel and rout 
The death-fires danced at night; 
The water, like a witch's oils, 
Burnt green, and blue and white. 
And some in dreams assured were 
Of the spirit that plagued us so; 
Nine fathom deep he had followed us 
From the land of mist and snow. 
And every tongue, through utter drought, 
Was withered at the root; 
We could not speak, no more than if 
We had been choked with soot. 
Ah! well-a-day! what evil looks 
Had I from old and young! 
Instead of the cross, the Albatross 
About my neck was hung." 
and 
"With throats unslacked, with black lips baked, 
Agape they heard me call: 
Gramercy! they for joy did grin, 
And all at once their breath drew in, 
As they were drinking all. " 
and
"For the sky and sea, the sea and the sky
lay like a load on my weary eye
and the dead were at my feet" 
 JRR tolkien.
 Why?
 Most of the content of the Lays of Beleriand. No, I won't be retyping any of it here. 
 
 
William Blake
Why? 
Blake was just way cool. i used to have a book of his poems, but it is lost now. The Poison Tree is the only poem I can recall right now, but there are many others I liked as well. 
William Shakespeare
Why?
 I liked a lot of his sonnets, actually. 
Edgar Allen Poe
Why? 
The Raven "Thrilled me--filled me with fantastic terrors, never felt before." 
The Conqurer Worm "And the angels sob at vermin fangs, in human gore imbued." 
And many others.
Ovid
Why?
The Metamorphoses: "Then came the age of iron, and from it poured the very blood of evil... and War, inspired by the curses of iron and gold, lifted blood-clotted hands and marched the earth." 
Of course I could also mention Jim Morrison, Dave Gilmore and Roger Waters (Hear the lark and hearken to the barkin' of the dog fox... gone to ground)