Corviknight@Expert Belt? Or maybe a Sharp Beak.
Nature: Adamant (+Attack, -Sp. Attack), Impish (+Defense, -Sp. Attack), or Jolly (+Speed, -Sp. Attack)
EVs: 252 Attack, 252 Defense/Speed, 6 Defense/Speed
Trait: Mirror Armor (Preferred) or Pressure
Steel Wing or Iron Head: Both are STAB. Iron Head has a greater Base Power, and can cause the target to flinch. Steel Wing has a slightly lower Base Power, and may increase the users Defense by one stage
Iron Defense: Increases Corviknight's Defense by 2 stages.
Body Press: the higher the Defense of the user, the more damage it does. Corviknight has high Defense, and it can be increased by Steel Wing and Iron Defense.
Drill Peck or Brave Bird: both are STAB. Brave Bird has a higher Base Power, but has recoil damage (1/3 of the damage done to the opponent is dealt to the user). Drill Peck has a lower Base power than Brave Bird, and has no effects (other than being able to hit any Pokemon on the field in a Triple/Double battle, but Brave Bird can do the same)