Braviary is completely overlooked. Highly underestimated as well. If trained and used correctly, it can dominate its competition with overwhelming power. Personally, Braviary is my favorite.
Braviary: Physical Sweeper
Item: Life Orb
Ability: Sheer Force
Nature: Adamant (+Atk,-SpAtk), Jolly (+Spd,-SpAtk)
Characteristic: +Attack or +Speed
Moveset:
Brave Bird/Sky Attack - STAB, powerful, though it takes recoil from both Life Orb and the move itself, the real damage is done to your opponent/STAB, boost from Sheer Force and Life Orb, no recoil, more power than Brave Bird but a two turn attack
Crush Claw - Utterly powerful with STAB, boost from Sheer Force, and Life Orb, no recoil
Rock Slide - Coverage, bonus power from both Sheer Force and Life Orb, no recoil
Hone Claws - Makes Rock Slide and Crush Claw more accurate and boosts power of all moves