I've got a Arms specced Orc warrior with O.E.B and pvp/defilers exalted plate armour and I'm able to hold my own really well in pvp.
Rogues can handled using hamstring MS and overpower when they dodge(overpower can be set up to have 50% chance to crit) and finish off with execute.
Ranged classes can be handled by either charge/intercept then hamstring, beserker rage to stop their fear spells, slam to interupt their casting if the pet is doing a lot of dmg then use intimidating shout to fear it away from you. The only problem I've found is if you get frozen to the spot then they teleport away from you, but again you can slow down their casting by using you ranged weapon.