Except Blake I enjoyed Dylan Thomas (for example, "Do Not Go Gentle Into That Good Night") and Robert Frost ("Му November Guest"). And for non-English poetry I'd name "Les Fleurs du mal" by Charles Baudelaire (although I don't speak French, so couldn't read it in original).
I know different interpretations of this poem, but for me it's all about corruption of innocence, the theme I'm really interested in.
@kotelric, don't get it, too, too experimental for me