most underpowered class in game?

[Keebz]

Probably Paladin or SK or Druid.

SKs are like really great in solo/group contexts and are actually strong in certain raid zones like PoF, so I have trouble saying they are under powered per se. Druid gets ports, SoW and Charm animal, so they can solo well enough and get to port, sow and spot heal raids. As for pallies, on raids you still want 1 or 2 to DS and Soulfire people--DA can also be useful, and you're a slightly better ramp tank than SK, though can't do the tagging and flopping. Solo I hear Paladins can do stuff at the top end, but I've never seen it.

I'd say leveling up, it's probably Paladin. At the high end, probably Druid.

All of the classes played well can be perfectly useful though and they all have their niches.

Honorable mentions:
Ranger: saved by WS and not doing wet noodle DPS. It's always nice to see rangers at raids and they can track and FTE race and solo a little. They have a solid niche.
Wizard: saved by flux staff and TL. For 32k dragons they also truck, but the most useful thing they do is kite and move people around at instant speed. Wizards are lowkey important for high end raiding here.