During National Poetry Month, I though I'd mention some of my favorite poets from time to time--in no particular order. Randall Jarrell remains one of my favorites. He wrote chiefly in free verse, and he often wrote dramatic monologues. No doubt his most famous poem is "The Death of the Ball Turret Gunner," a brief, uncanny, seemingly perfect poem. I also like "Next Day," "The Woman at the Washington Zoo," and "90 North," among others. Jarrell was also a well known--and somewhat feared--critic of poetry. After he had reviewed one of Karl Shapiro's books, Shapiro wrote that he felt "run over but not injured" (my paraphrase) by the review.
Here's a link to more information about Jarrell.
And some links to books by and about him:
The Complete Poems
Poetry and the Age
Remembering Randall: A Memoir of Poet, Critic, and Teacher Randall Jarrell
A Sad Heart at the Supermarket: Essays and Fables