This is my best yet. :)
Ninjask (M) @ Focus Sash
Trait: Speed Boost
EVs: 252 HP, 4 Atk, 252 Spe
Jolly Nature
Swords Dance
Protect
Baton Pass
X-Scissor
Even though this guys in a lower Tier (I think), I use this for the ultimate Baton Pass to Kyurem-Black. He'll use Protect for an extra Speed Boost, and when the opponent tries to hit 'im next turn, he hangs on and uses Swords Dance. Then he Baton Passes to Kyurem-Black for ultimate sweeping.
Kyurem-Black (X) @ Choice Band
Trait: Teravolt
EVs: 4 HP, 252 Atk, 252 Spe
Adamant Nature
Outrage
Zen Headbutt
Fusion Bolt
Dragon Tail
Like I said before, after Ninjask's strategy is complete, this guy's the ultimate physical sweeper. Dragon Tail is for the annoying phaze, Outrage is for complete pwnage agains almost everything except Heatran, Zen Headbutt is for coverage, and Fusion Bolt is for more. Noone can survive!
Espeon (F) @ Focus Sash
Trait: Magic Bounce
EVs: 4 HP, 252 SpAtk, 252 Spe
Timid Nature
Shadow Ball
Psychic
Substitute
Calm Mind
This one's my special sweeper. Once a Substitute's up, she'll Calm Mind until she either can't or the Substitute fades, then sweeps. Psychic is a strong STAB, and Shadow Ball is for coverage.
Hydreigon (M) @ Choice Scarf
Trait: Levitate
EVs: 4 HP, 252 SpAtk, 252 Spe
Bashful Nature
Dark Pulse
Dragon Pulse
Fire Blast
U-turn
I felt that Draco Meteor would ruin the sweep, so I chose Dragon Pulse over it. This guy needs no setup, he just fires away at anything. Fire Blast gets rid of Steels, like Forretress, Dark Pulse and Dragon Pulse are great STABs. U-turn is for getting away from something bad.
Gliscor (M) @ Toxic Orb
Trait: Poison Heal
EVs: 252 HP, 184 Def, 72 Spe
Impish Nature
Earthquake
Fire Fang
Toxic
Protect
A great physical sweeper, along with an excellent ability, makes Gliscor (Or maybe some would prefer Gliscurr) an excellent addition to any OU. Sheesh, I sound like an advertizer for Serebii. XD Anyway, Protect and Toxic are for stalling, Earthquake is a great STAB move, and Fire Fang is for the Ice-types.
Blissey (F) @ Leftovers
Trait: Serene Grace
EVs: 252 HP, 252 SpAtk, 4 SpDef
Modest Nature
Charge Beam
Ice Beam
Aromatherapy
Softboiled
Listen, before you run into your room, screaming into your pillow, "SS IS SO STUPID!!!" hear me out. Blissey uses Charge Beam to get that Special Attack up. Because of Serene Grace, it'll always raise it. Ice Beam is for the Dragons that seem unstoppable (believe me, a dude misclicked when this was facin' a Dragonite, and I didn't even use one Charge Beam, and it still KO'ed it on the spot!). Aromatherapy is for Status, and Softboiled is to heal.
Well, hope you like the team. Do a good job! :D
