Torrorosso @ Ner'zhul has taken the dragon by the horns with his Dragon Soul inspired set!
Aellin's guildmate, he has taken this set and moved towards a theme that shows he is a proud member of the Horde, particularly by using the Edge of Agony to go along with his Deathwing armor.
This is a good example to show that even standard sets are transmogrification worthy. Beauty, as they say, is in the eye of the beholder. If you like a set: Mog it. There is nothing out there saying that every set has to be a mix of items. The time and effort it takes to make a single complete set of armor is well worth showing off! :p
Helm: Colossal Dragonplate Helmet
Shoulders: Brackenshell Shoulderplates
Chest: Colossal Dragonplate Battleplate
Waist: Forgesmelter Waistplate
Legs: Colossal Dragonplate Legplates
Feet: Bladeshatter Treads
Gloves: Colossal Dragonplate Gauntlets
Cloak: Gong-Lu, Strength of Xuen
Shirt: Tailored Member's Shirt
Main hand: Edge of Agony
(xmog.cc set link)
(wowhead compare link)