Salamence

To put it simply, Salamence is an offensive powerhouse. Boasting the second highest Attack stat of any Dragon-type in OU at base 135, Salamence can easily take out the opponent with its massively powerful STAB Outrage, both before and after a boost. Salamence is made even more threatening by the addition of Moxie, allowing its damage output to snowball to uncontrollable levels. Intimidate is another nice ability that enables Salamence to tank physical hits just a bit better, and complements its decent defensive typing and stats. Furthermore, Salamence can separate itself from its Dragon-type brethren quite easily when using Dragon Dance, thanks to a higher Speed stat, as well as the ability to go mixed, taking out Steel-types outside of rain thanks to Fire Blast backed by a base 110 Special Attack stat.

Salamence does have a few key weaknesses, however. The most apparent of these is its vulnerability to Stealth Rock, which cripples even sets with Roost. Salamence's Speed could also just be a smidge faster; many Pokemon that outspeed it can hit it super effectively with Ice- or Dragon-type attacks. Garchomp in particular is a huge threat to Salamence, as Choice Scarf variants of Garchomp outspeed Salamence even if it has acquired a Dragon Dance boost and smash it with either Outrage or Stone Edge. Steel-types can also come in on Salamence if it's locked into Outrage and do whatever they please. However, don't let these drawbacks prevent you from using Salamence; there was a reason it was banned from DPP OU!