My pick:
Dragonite @ Lum Berry
Ability: Multiscale
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Outrage
- Dragon Dance
- Earthquake
- Extremespeed
This is the only set any dragonite should run.
I must admit that is another set I have used with great success. Earthquake is great coverage, extreme speed helps finish opponents off, outrage is very powerful and DD just adds to that. All these sets seem to share similar moves, but there isn't really many variation needed.
How about we talk Dragonite counters?
My first thought is Azumarill. Immune to outrage, resist fire punh (if used) and doesn't really care about the other moves. It also dishes out major blows with huge power play rough.