First off the first four fights were great and each fight was validated by the need of a clear winner. Pac got KTFO.
And yes Malignaggio, Maidana, Brook, Khan, even Senchenko.
Bute fought Denis Grachev who was coming off an upset win over Ismayl Silakh after Bute's loss to Froch.
There are plenty of people other than Marquez Pacquaio can fight.