I don't get the Howard love. Yes, he's shooting an insane %, but he's scoring 12 and 12 per 36. Parker is realistically the only one who you mentioned who should qualify for the "MIP/Comeback player of the year", but his stats are on par with his career really. He's had, recently, a few good games, but his season as a whole has been among his worst.
He's genuinely contributing to a winning team. Has that happened since he left Orlando? He's learned how to become a very good role player.