Hmm, I'm gonna say EVE Online.
If you're thinking competitive you shouldn't be looking at MMORPGs, rather games like:
- Dota 2
- League of Legends
- Starcraft 2
- Street Fighter
- Quake Live
And there are plenty of competitive MMO's out there. There are tons of games with PvP in them, and it doesn't get any more competitive than PvP. I don't see how someone can classify PvE as competitive when you're literally not competing against another person.
Final Fantasy 14: Level 50 (ilvl 96) WHM, Level 50 (ilvl 90) BLM, Level 50 SCH, Level 50 SMN.
Guild Wars 2: (Ehmry Bay) 64 Ranger.
Diablo 3: 70 Wizard, 60 Demon Hunter, 60 Witch Doctor, 65 Paragons.
Wildstar: 37 Spell Slinger DPS.
ArcheAge: 50 Gypsy.
Trove: On and off. 20 Candy Barb. 20 Neon Ninja. Have all classes.
league of legends....