Anyone for a good debate?

[Earendilyon]

Personally I think that just one of the Valar, say Tulkas, or even Gandalf the White would've been powerfull enough to overcome Sauron, if he had been in control of ME.
They would have had no dealings with Sauron's minions, nor even with the Nazgûl, but only with Sauron himself. As Sauron was far less powerfull than Morgoth and since he had to spend a lot of his power to controll all his minions and to keep in check the suppressed human and Elvish peoples, he would have had far less power.
Tulkas overcame Morgoth in man to man ( [img]smilies/smile.gif[/img]) combat, so he certainly could've overcome Sauron. GtW got a big power boosting when becoming 'The White' and being send back to ME. If all else had failed, I think he was appointed by Eru to manifest himself in all his power and take Sauron from his hideaway in Mordor and bring him to Manwe (or Eru) for judgement.