good PvE/WvW class?
There’s a good place for almost any class in WvW due to the big numbers in the group and every class has their own speciality to bring to a zerg. For example:
Guardians: Provide the neccesary buffs for a zerk to stay alive such as Stability, Protection, Condition Removal.
Warrior: Good Frontliners, especially feared for the crowd control on Hammer.
Elementalist: Waterfields, Firefields (people blast them for healing/damage) and some crowd control and great AoE potentional.
Mesmer: Portals, Veil (makes the whole zerg invisiable for 5 seconds) and boonstripping.
Necromancer: Boonstripping.
Engineer: Quite a bit of healing with bombs in the right spec.
Ranger: No idea, only roamed with them.
Thieves: Finishing off any stranglers mainly, Shortbow gives them loads of blastfinishers, but once again I only really roam with them unless the zerg needs numbers.
And almost any class can provide plenty of damage to actually kill the enemy zerg. For roaming any class works though I’ve encountered Necromancers very little if at all. Most popular are likely Thieves due to stealth, Mesmers, due to once again, stealth and Elementalist, high mobility.
For PvE there’s less room (5 people vs 10+ or even 30+) for verstility and generally people want one thing: as much damage as possible with the needed survivability (dodge covers a surpisingly big amount.) Though every class can contribute in one way or another, Necromancers, Engineers and Rangers tend to be the least beloved by the average group where-as Warriors and Elementalist seem to be beloved in almost any group.
Do keep in mind meta’s can shift and classes can go from strong to weak and the other way around. Make sure if you pick just one class you enjoy their mechanics.