Return of Reckoning

I am returning to the game after a year, what’s the most needed class that I can join casual pugs with. RvR and Scenarios mostly. Order or Destro is cool! I have played black orc, warrior priest and DoK to max level so preferably not one of those three but if they are the strong leaders I will.

Welcome back !

For pugs, you can play all kind of tanks and healers. With this archetypes, you can easily create or join a party.
If you want to lead, tanks, WP or DoK and melee dps (AoE Sorc/BW too) are goods.

If you are looking for faster group finding, tanks and healers are the way to do it.

Kotbs/Chosen or WP/DoK are the most sought-after classes, pug and organized.
But, as others mentioned, any tank or healer will do.