Despite less common, I would like to propose #715 Noivern
First, I don't know if any of you have realised it, the once shitty ability infiltrator now bypasses substitute. This alone have checked many of the strategy currently viable, most notably protect/substitute. Unfortunately he doesn't process the many frustrating support moves blocked by substitutes, this may be a concern for other infiltrator users, but as far as I know the pool is really small, and many of them have better choices like prankster and shadow tag.
Secondly, despite having a rather pitiful 97 SpA and no access to offensive stats boost, its movepool is really deep, which involves Flamethrower /Dragon pulse /Air Slash/Dracometeor /Psychic /Shadow Ball /Dark Pulse /Solar beam(wtf?) /Focus blast for the special side.
But most importantly, it has the semi-signature Boomburst, 140BP and 100 accuracy, and U-turn, which is shared by no other dragon pokemon outside Flygon. A 123 Spd Taunt/Moonlight/Roost is also sth that should be appreciated.