For me, watling is the best all around of the 6 I have watched a fair bit of: Wadsworth, Lees, Smith, Parore, BMac and BJ. (Forget germon, Jock Edwards or young, all break glass situation or in Germon's case, regional parochialism run riot - the reuben thorne of NZ cricket
Of the 6, I actually rate Parore as the most technically proficient and smoothest of them all.
Wadsworth, Lees and Smith are pretty much all in a group - they had different strengths depending on the attack and conditions.
But in terms of all around contribution and glue, I'll take Watling everytime.
Lees, Parore and Smithy to some extent with his decision making while batting were loud personalities and could be a distraction. Wadsworth could be untidy although that may be more a case that he looked like he was perpetually just arisen from a 5 day bender. Bmac, a very good keeper but once he gave up the gloves he became a much much better player.