Arceus-Steel is good.

Steel resists Ghost and Psychic.
It has 120 SpD.
120 Atk and SpA.
It's in Ubers, which is above RU.
Arceus-S @ Iron Plate
Trait: Multitype
EVs: 248 HP / 8 SpA / 252 Spe
Timid Nature: (+Spe, -Atk)
- Calm Mind
- Judgement
- Recover
- Thunder/Will-O-Wisp
Arceus-S @ Iron Plate
Trait: Multitype
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature (+Atk, -SpA)
- Swords Dance
- Recover
- Extremespeed
- Earthquake/Iron Head
Some Pokemon under OU that follow that rule are: Heatran ( High SpA, not Atk) / Shuckle (If you use it right, [Contrary Shell Smash, Power Trick, etc]) I know Shuckle is NU but with the right moves and able to set up it can dominate in OU (I've seen it before)