Murkrow

Murkrow is one of the most simple, yet one of the most dangerous Pokemon in the NU metagame. An extremely high Speed stat, STAB Drill Peck, and really high Attack when combined with a Choice Band give it an incredible offensive presence on the battlefield. While it's extremely similar to Pidgeot, which even boasts the same Speed stat, Murkrow has a slightly better typing, ability, and overall coverage than its brother-in-wings. Insomnia makes Murkrow a golden answer to a majority of the Grass-types in the tier (though it needs to be really wary of Stun Spore), and its Dark typing means it can get a free switch into Chimecho's STAB Psychic and threaten it back with Shadow Ball. While it is much, much frailer than Pidgeot, and its STAB Drill Peck is leagues weaker than Pidgeot's Double-Edge, there's still very little risk to using Murkrow. Quoth the raven: "your walls will be nevermore."