I think Kate Mulgrew deserves to be nominated for every award for which she's eligible. Of course everyone else does an excellent job and there's no weak link, plus Samira Wiley ('Poussey'), Taryn Manning ('Pennsatucky') and Laverne Cox ('Sophia') all have charisma, but I've been aware of Kate Mulgrew since Mrs Columbo and she acts circles around every one else.
Otherwise, I really don't get why some people hate on 'Dr. Fleischman' (Rob Morrow). Sure, in the fifth season it was pointed out that he had never hosted a dinner party and when he tried, he used canned mushrooms, but I totally knew him in the beginning and by the end, he was meeting Adam Arkin on a vision quest.