Return of Reckoning

Hello all.

I am new to the game and have been trying out various classes, getting them to each to level 10 and grabbing their first set of scenario gear. What class should I play if I want to contribute the most to the victory of the team in scenarios and RvR? I'm pretty sure DPS won't be the answer. Do you a good tank or healer contributes most to a group's chances? If so, what kind of tank or healer? Thank you for any advice.

If you don't have tanks - your DPS will die.
If you don't have DPS - nobody will die on their team.
If you don't have healers - you will all die.

All classes are equal in contributing to a team, the server is pretty balanced now so any class you pick will have their place. Try out what you enjoy and run with it.

definitely need tank or heal.
we need tank types that enjoy mitigating damage, don't afraid to die, form walls and lines.
and healer types that knows priority.
heal target, rez timing, position etc.
class doesn't matter.