Does horror have a place in poetry?

[heslopian]

Often when I read poems which embrace horror, they're a bit silly and egotistical. Lots of stuff about dragons drinking blood and how a broken relationship is like a zombie nibbling a brain. A brain of UNREQUITED LOVE! Sylvia Plath, I think, was a very good horror poet. Her nastiest work was filled with dark spaces, magic, violence and sarcasm. Poe was great too, of course. So my question is, I guess, have you ever read any great horror poems, and do you think that horror and poetry go together?
(By the way, by "horror" I don't just mean "dark"; horror should at least mean to evoke fear, disquiet, or at the lower end revulsion).