Scarlet

 Here is the list of Scarlet transmog set items:

• Imposing Bandana
• Bonechewer Shoulderguards
• Primalstorm Breastplate (Only Leatherworkers)
• Blasting Gloves
• Burning Blade Devotee's Cinch
• Nice Shorts
• Sandals of the Insurgent

Accalia

Here is the list of Accalia transmog set items:

• Cursed Vision of Sargeras
• Hide of Chromaggus
• Tunic of the Nightwatcher
• Starlight Gauntlets
• Eva's Strap
• Kilt of the Night Strider
• Ghost Iron Staff
• Sandstalker Ankleguards

Red Kitten

Here is the list of Red Kitten transmog set items:

• Swashbuckler's Eyepatch
• Grim Lasher Shoulderguards
• Tribal Vest
• Shackles of Dark Whispers
• Cardio-Extractor Gloves
• Burning Blade Devotee's Cinch
• Mystic Sarong
• Sandals of the Insurgent
• Avool's Sword of Jin

Nuitari

Here is the list of  Nuitari transmog set items:

• Cover of the Keepers
• Shoulderguards of Assimilation
• Flamestrider Robes
• Soulstone Breaker Wristbands
• Gunner's Gloves
• Belt of Swift Failure
• Warchief Kilt
• Sandstalker Ankleguards
• Ceremonial Warmaul Blood-Blade (dagger)
• Spire of Coagulated Globules (staff)

Forest Nymph

Here is the list of  Forest Nymph transmog set items:

• Crown of the Forest Lord
• Mantle of Autumn
• Jinxed Hoodoo Skin
• Grips of the Lunar Eclipse
• Belt of Potent Chanting
• Jinxed Hoodoo Kilt
• Sandstalker Ankleguards
• Resonating Axe (1-hand axe)
• Draenic Wildstaff (staff)