The late Lucille Clifton, Tim Seibles, Natasha Trethewey and Terrance Hayes and of course Claudia Rankine (whose book I still have not read).
Thank you, Elizabeth Austen, for your thoughts. How art — especially literature and poetry most of all — can help us.
(She has one of the best Poet Laureate websites around, imho, listing poets, presses, and other information from her state. Lovely.)