Ok, here we go.
1.Class: Paladin: im not telling the talent, just because almost every class gets seriously pwned by them, they have really slow attacks but every attack is really powerful, plus their healing spells like flash heal,etc.
2.Class: Mage Talent: Arcane, Arcane Mages are really powerful, their attacks are really fast and brutal, i remember when i was level 68 and at that time i had like 10k of life, 3 attacks of an arcane mage and i was dead, although they dont have pretty much resistance, an average of an level 70 mage is of 8.000, they are pwnage in bgs because you cant really attack them unless your a pallie, they can solo almost every single class.
3. Class: Warrior Talent: Fury, Fury warriors are almost the most powerful DPS on all WoW, they have really swift, fast and brutal attacks plus they upgrade at level 69 of titans grip, it lets them wield 2H weapons in one hand, a really good geared fury warrior can solo and easily kill a druid in bear form or a dk, their problem is that they dont have any healing spell, so they cant get heals when solo, a very good healer with a fury warrior is unstopabble