I would think that Westbrook and Harden were 1 and 2 in voting. Kawhi is the close one in comparison to LeBron which is where I could see it potentially coming down to interpretation; but even then, Kawhi, to me, has set himself apart from everyone else in the league in the terms of value that he brings on both sides of the ball combined. He was effectively a wash with LeBron in PPG.
Understandably, LeBron was more efficient (due to the nature of his looks and the intangibles from his supporting cast), but he really doesn't jump out (let alone doesn't lead all of the other three) in any of the other offensive categories (other than the fact that he is the only player in the top 10 of PPG to shoot less than 70% from the free throw line).
Defensively, I don't think LeBron compares to Kawhi from this last season. I get it, he's an outstanding playoff player and a very, very good regular season player. But that's not what the MVP award recognizes.
For the record, none of this matters, as I'd imagine the award is going to Russell regardless of how the others shook out.