Three Billboards Outside Ebbing, Missouri. Very dark. In fact, I'd say it leans more towards dark drama than outright dark comedy, though it has its humorous elements in addition to all of the tragedy. All well acted, particularly Frances McDormand and Sam Rockwell. Peter Dinklage is great as well, but man, I wish he was in it longer.
I would put good money on McDormand getting nominated for Best Actress. Whether she'd win, I don't know, but I do think she can at least get a nod.