A low ranking on this list might surprise some, but Artest does tend to get by on reputation a good chunk of the time. He gambles for steals, or ignores any chance at help defense as he obsesses over his man, and overplays to the point of hurting his team. He can be the rare selfish defender. He can also be the best defender in the league, mixing a desperate doggedness to dominate with long arms, a sturdy frame (to say the least) and quick feet.
http://sports.yahoo.com/nba/blog/ball_dont_lie/post/The-top-10-best-defenders-of-the-last-decade;_ylt=AguWIobfTvquo7.Qzi8LTF.8vLYF?urn=nba,185792
My List:
1) Wallace
2) Duncan
3) Garnett
4) Mutumbo
5) Battier
6) Artest
7) Bowen
8) Camby
9) Bryant
10) Howard