Greenskin Character Classes
1. Black Orc

Armed and armored to fight in the thick of melee as a warrior and tanker, the Black Orc matches physical hardiness with a down and dirty brawler's fighting style that makes him the heart of any war band. With choppa and shield in hand, he can face down any foe unshaken. However, it is his unique approach to fighting that makes him as deadly with his fists as with either of those tools. He'll knock you down so you can't fight back, and then kick you while you're down. There's no honor among Greenskins, and there's no such thing as a fair fight - and that's the way he likes it!
Link: http://www.warhammeronline.com/english/gameInfo/armiesofWAR/Greenskins/Careers/BlackOrc.php
2. Orc Choppa

Even the most stable Orc is only a hairs breadth from coming completely unglued in the heat of battle. It is to the great relief of their opponents and allies alike that most of them manage to keep it together. There are some Orcs, however, that just can't be bothered with that sort of thing. These are simple creatures - simply violent, simply well armed, simply a bloody nightmare to keep from running blindly into the fray - and they are among the most deadly of opponents one will ever face in the heat of a melee. These are Choppas, named for their weapon, and their weapon named for them, and their frenzy is to be feared.
Link: http://www.warhammeronline.com/english/gameInfo/armiesofWAR/Greenskins/Careers/OrcChoppa.php
3. Goblin Shaman

He's got Waaagh!, and he's not afraid to use it! What more can you say about a lad who gets the big Waaagh! going when the boyz roll out? The Shaman channels the primal bloodlust of the Greenskins into effects both beneficial and baleful. He keeps the lads up and running far beyond their normal capabilities and calls down the wrath of the twin deities, Gork and Mork, onto his enemies. The one feeds the other and around he goes, delivering a deadly combination of healing magic and stomping, pummeling power without pause.
Link: http://www.warhammeronline.com/english/gameInfo/armiesofWAR/Greenskins/Careers/GoblinShaman.php
4. Goblin Squig Herder

One-on-one a Squig is no match for the likes of a Hammerer or Ironbreaker, but the problem there isn't the match, it's the numbers. The toothy embrace of a pack of Squigs has brought down many a hearty warrior, and a Squig pack is never more effective than in the hands of an expert Herder. Using tools ranging from pipes to goads to bits of giblets, the Squig Herder drives his minions to a killing frenzy while fighting safely behind the lines. The Herder's own ranged fire combines with the attacks of his minions to challenge any foe.
Link: http://www.warhammeronline.com/english/gameInfo/armiesofWAR/Greenskins/Careers/GoblinSquigHerder.php