19. 2009 North Carolina Tar Heels

Key Players: Tyler Hansbrough, Ty Lawson, Wayne Ellington
Finish: Won the national championship
Record: 34-4
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When you have not one, not two, not three, but four players come back to school rather than declare for the NBA Draft just a few months after going to the Final Four—including one nicknamed "Psycho T" (Hansbrough)—you just can't help but be badass. And that's exactly what Roy Williams had in '09. This team was focused on winning a 'chip and once they got to the tournament, they didn't let anyone stand in their way as they rolled off six victories by an average of 20 points.