Simon Dwight?
The odd spectacular blocked shot does not make a great defensive player.
This award has never been judged correctly as people need a 'moment' or statistic to judge it by. Fact is the best defensive players are not able to judged by stats. Team defence wins games so the ability to not make defensive mistakes in a team cohesiveness should be the criteria. That can only be judged over a period of time by a trained eye. If you do want stats to judge it by then the amount of times a guy denies his man the ball, rotates correctly on help d, boxes out, gives up nothing in defensive transition, contests shots should be recorded. But they're not, so people simply look at steals and blocked shots to determine a 'great' defensive player. Andrew Gaze actually had decent steal numbers during his career but that was because he simply cheated lanes and took the easy option. I dare anyone to say he was a defensive juggernaut.