My team?
Claire "Lightning" Farron (Final Fantasy XIII). Why? She destroyed an entire security fleet with a sword and a horse, then took out several battalions of highly trained special forces without breaking a sweat, the four shot killed a god like being. You know what else? Square Enix has rumored that she has more power than a Fal'Cie in the sequel. She has MORE POWER than beings who can create planets and rides the god of thunder/lighting, Odin, like a horse!
Dante (Devil May Cry... not DmC). You really shouldn't need to ask why. Heck, he's already taken on the best that hell has to offer and laughed his ass off at them after kicking their sorry asses.
Nero (Devil May Cry 4). There must be a badass gene or something because Nero is no wimp himself. Plus, he has a motor sword...nuff said.
Vash the Stampede (From Trigun Maximum...Oh, and he only has problems with killing the living, not the already dead). His mother freaking arm can literally transform into a weapon called the "Angel Arm" and can create blasts equal to a nuclear blast, has impossibly accurate aiming skills, and is an overall badass.
Doctor Who (tenth and eleventh regenerations)...Do I really need to say anything?
Ichigo Kurosaki...he basically destroyed hell in the fourth movie of Bleach. With one swing of his sword, he was able to destroy and entire mountain...that's how broken his power is in the world of Bleach. Plus, he is basically a walking wall of plot armor.
I'll have Satan's head by mid afternoon.