The Lakers were on a short list of teams that Gasol, CP3 and Dwight were willing to be traded to. If I remember correctly Paul only wanted to be traded to the Knicks, Lakers or Clippers. Location is a huge advantage Mitch has over other GMs and he had an owner that was always willing to go over the cap. That should not be overlooked. Chris Paul was never a Laker. So Mitch shouldn't even get credit for a trade that wasn't even completed.
Ariza trade in 07 was a good move, but these other GMs consistently made great moves by drafting well, signing good FAs and making good trades.
I would also put Masai Ujiri and Daryl Morey over Mitch.