Depending on where you are at. In terms of non super powers it's either warlock or titan. Because they can gain shields with melee. (Sunsinger and defender) or have other powerful attacks like shoulder charge. In terms of supers: In pvp the hunters are the best. BUT in pve they are BY FAR the worst. Titan: can be used anywhere on anything in pvp it's quite literally an I win button. Defenders super is great for bosses. (Extra damage and cover) Warlocks super: nova bomb is devastating I once killed all 6 members of the enemy team with it. No denying that it's powerful even in pvp. Sunsinger. Great during hard raid because you gain an additional chance to finish your objective. Also it lasts the longer and in pvp it's a 1 hit melee and unlimited grenades.