I would easily put '04 USC as the 2nd best...
But 2001 Miami is hands-down the greatest assembly of future NFL talent on a college team ever. Most talented college team ever fielded, in history, and there's no argument.
One thing I'd consider though; USC could have at least made a game of it (or even won), as I'd take Pete Carroll and his staff c.2004 over Larry Coker. I'd call USC '03/'04 the best coaching staff of the decade.