Juan Manuel Marquez. he beat Pac twice in my opinion and is the better fighter, he should be there in place of Pacman and ahead of Calzaghe.
Most people here have Pacquaio P4P no2 but most people on here had Pacquaio losing his last fight, who P4P no1 Marquez?
Calzaghe is, quite simply a better fighter than Pacman, far more complete, and I'm not sure if Pacman beat Marquez. Having said that, Pacman has a far better resume, so I cant argue with Pac at number 2.