Another Dark Ranger

Another Dark Ranger look for transmogrification, but this time it's mail.

Avenger's Armor
Rip-Flayer Leggings
Renegade Boots
Blackforge Girdle
Blackforge Gauntlets
Striker's Mark
Cloak of the Black Void
Blackforge Cowl
Stylish Black Shirt

Booty Bay Bruiser

A fairly simple character to make if you have a leather working. The boots and gloves from the original BB Bruisers are leather, so would not be able to be transmoggged with the mail parts of the set so I have had to make do with some others. Also added shoulders, as you can't play a character with no shoulders, how will they protect themselves!

Heavy Scorpid Vest
Heavy Scorpid Leggings
Heavy Scorpid Belt
Nerubian Boots
Nerubian Gloves
Battle Star

Uh Batman?

Okay, so this is pretty silly, but I was just playing around and couldn't resist after finding the head.

Mask of Inner Fire
Black Dragonscale Leggings
Black Dragonscale Breastplate
Gray Woolen Shirt
Swiftarrow Belt
Gloves of Taut Grip
Boots of Unsettled Prey
Spored Tendrils Spaulders
Shrapnel Star

Tirion Fordring

Transmogging into the famous Paladin is very easy (aslong as you are a paladin that is) Tirion basically wears tier 6 chest, legs, and shoulders, with the belt and boots being boss drops.

Pearl Inlaid Boots
Girdle of Hope
Lightbringer
Argent Crusader's Tabard

High Astromancer Solarian

A very easy one for a Blood Elf Warlock, however I was hoping to find something similar looking for another type of clothey, but I didn't have much luck.

Lurkers Cord
Boots of Infernal Coven
Voidheart Raiment
Shaard the Lesser

VanCleef

This is the cloest I could get to the final boss in The Deadmines, the legs that the boss wears are cloth, and so would not be able to be transmogged, and also the Red Defias Mask is a grey item, and at this moment in time I don't know if it would be available.

Warbear Woolies
Razorfury Mantle
Black Featherlight Boots
Bloodfang Gloves
Vancleef's Breastplate of Conquest
Tabard of Flame
Bloodfang Belt
Sunroc Mask

High Inquisitor Whitemane

This is the closest I could get to the Scarlet Monastery boss, the Glowing Brightwood Staff is a world BOE drop, so if you are unable to pick that one up there are other options, just in a slightly different colour, like the Guiding Stave of Wisdom.

Whitemane's Chapeau
Cindercloth Pants
Crimson Silk Shoulders
Fire Striders
Cindercloth Vest
Sash of the Burning Heart
Sunfire Handwraps

Druid of the Talon

Druids of the Talon, one of the guardians of Mount Hyjal.

Feathered Breastplate
Ironfeather Shoulders
Nordrassil Headdress
Nordrassil Chestplate
Nordrassil Feral-Kilt
Heavy Earthen Gloves
Might of the Timbermaw
Fordragon Blades

Dark Ranger

This is my attempt at a Dark Ranger, although this character is holding a bow, as the armor is leather making this a rogue look (so it's more of a Dark Rogue, but that name doesn't really stick.) There are also a variety of heads that look good with this, including eyepatches, but unfortunately no hood like the npcs.

Demonic Runed Spaulders
Stoneskin Gargoyle Cape
Opportunist Leather Legguards
Opportunist Leather Tunic

Opportunist Leather Gloves
Bloodfang Belt

Dark Leather Boots

Black Bow of the Betrayer