My team's lead
I use Donphan as a lead:
Donphan @ Leftovers
Impish Nature (+Def, -SAtk)
252 HP / 252 Def / 4 Atk
- Earthquake
- Ice Shard
- Rapid Spin
- Stealth Rock
The strategy is simple: Set up rocks, spin away hazards and throw your attacking moves in the opponent's face.