Here are my nominees by sport for the years 2000-2009. I gave it my best shot.
College football Byron Hout
NFL Brett Farve
MLB Rafael Palmeiro followed closely by Roger Clemens and then Barry Bonds
College Basketball Rick Pitino followed closely by Tim Floyd and John Calipari
NBA Rick Pitino followed closely by Tim Doneghy and Kobe
NHL Marty McSorley
Soccer Zidane
Dictators Saddam Hussein
Music Michael Jackson's "doctor" followed by Kanye West and all the husbands and boyfriends that have to sit through their significant others watching American Idol for hours on end
Chess Deep Blue
Real life Bernie Madoff followed by Somali Pirates
Politics Everyone? The American people? With SNL clearly the winners
Religion Roman Catholicism (It's been a tough decade)
When we're done with this maybe we can do winners