Thief: Greatsword and offhand sword
Mesmer: Main hand pistol with some of the Mesmer clone effects like the dual pistol firing
Ranger: Rifle
Warrior: I'd say staves but we're getting that so maybe something magey kind of like those anime and street fighter with the ki blasts XD
Guardian: Daggers
Revenant: Rifle or main hand gun. Just another ranged in some form.
Elementalist: Long bow or short bow or rifle
Necromancer: rifle, bow, or mace