I encourage all of the people who are saying longbow/greatsword ranger to give axe/axe a try. Pulling someone, rooting them and then spinning on them for a large chunk of damage is so satisfying. You can still keep either the greatsword for block, mobility and maul, or longbow for the stealth and range depending on your playstyle. Axe 3 is also a good chunk of damage. Ranger has some of the strongest 1v1 potential in the game.
That said, mesmer and thief are right there with ranger and will still be better options for running away/resetting if staying alive is your priority. Very little in this game can speak to numerous stealths and teleports. Warrior is still a pretty solid choice, though you better land your stuns. They can chunk for a lot of damage and keep up with anyone without a teleport. Condi rev is also viable, as are scrapper/holo builds. Heck, I see some burn elementalists out there putting in work, and core necros can build to be nigh unkillable for a time. I'd say overall your best picks are thief, mesmer, ranger, engi and warrior.
Really, it all comes down to preference. Maybe hop into pvp and see which professions you enjoy playing the most? I base my play on that more than what's the most powerful during any given meta.
~ Kovu