Fabulor Mog: Argent

Head: Golden Circlet (unavailable now, but many gold circlet helms exist)
Shoulders: Heroes' Redemption Shoulderplates (Naxxramas 10)
Back: Cranewing Cloak (Mists of Pandaria legendary cloak)
Chest: Contender's Spirit Breastplate (Blacksmithing)
Tabard: Argent Crusader's Tabard (Argent Tournament)
Wrists: Wristguards of the Holy Warrior (Mists of Pandaria CMs, not necessary though)
Hands: Warmongering Aspirant's Scaled Gauntlets (Warlords of Draenor PVP)
Waist: Sunscale Belt (Bind on Equip)
Legs: Enchanted Thorium Leggings (Blacksmithing)
Feet: Sollerets of Instability (Terrace of Endless Spring Normal)
Main Hand: Steelforged Saber (Blacksmithing)
Off-Hand: Fire Runed Grimoire (Molten Core)