Needed Classes in GW

Being new to GW, I have a few questions.

In other MMORPG there are certain classes that are needed more than others. As an example, pure healers, pure tanks, AoE classes are always needed.

My question in, are there these staple classes in GW? Which are they?

Try not to think of GW as an MMPORG. It's really not. Success in GW for both PvE and PvP depends on team work. Each class plays a very important roll. It's designed in such a way that no one class can do it all.

There is no "certain classes that are needed more than others". To have a truly successful group you need to have one of each class. Some will argue that point.

I will say that there is currently a shortage of Monk's. Monks are nice to have in your PUG. Not vital, but very nice.

I wouldn't look for needed classes. Consider the role you want to play; the game you want to play. Do you want to beat away at things with a hammer? Do you want to spend you time looking at health bars and managing them? Do you want to sit back and plunk arrows or spells at someone? Would you like to situationally inhibit your opponents?

There are multiple class combinations for each of these. You can always pick up a "needed class" in the form of healers, tanks, or whatever you please.