Does yelling AND ONE! on every shot attempt count? If so, David West by a mile.
Tyson Chandler's gotten pretty bad about it. Maybe he's always been that way and his teams generally sucked so I never watched but seems like he's turned into a pretty big whiner since he's been in NYC. I remember a play against Indy earlier this year where Indy put up a shot and Chandler thought he got shoved on the rebound and turned to the ref complaining and just let the Pacers get the easy offensive board and score. It's one thing to complain after the board's secured and you're bringing it up the floor, but during a live play is just ridiculous.