I thought Harden was most deserving.
Yes, he had the ball in his hands more, but it is still not easy to go from 17ppg to 26ppg in one season. From being a 6th man to being the 5th highest scorer in the NBA is no easy task, no matter how much more the ball is in his hands. And he wasn't just chucking up shots, he also dished out 2.1 more assists per game and maintained a reasonable level of fg% at 43.8% (which is right around his career 44.1%).
All that along with what that team was able to accomplish... Harden led a much inferior team to the same record as that which Kobe led the Lakers to. Houston has nowhere near the talent around Harden that the other West playoff teams have.
I don't love Harden, but I'm very impressed by Harden's season.