Grukk Face-Rippa
With the advent of the Sanctus Reach campaign, we get this guy. Aspiring enough to have killed his Warboss and lead a Waaagh! in return, Grukk Face-Rippa is the Ork equivalent of that one Neckbeard that always gets shit done. Among his list of accomplishments was:
1. Ripped open a Space Marine Drop Pod during the Battle of Black Reach and massacred the ten Marines inside,
2. Tore the face off his Warboss and struck fear into every other Ork in the Waaagh! (not a small feat, considering how brave Orks normally are),
3. Brutally slaughtered the entire Obsidian Glaives Chapter, and
4. Led the initial assault on Sanctus Reach.
Unfortunately, this guy might be dead, 'cause some Mek decided it would be a great idea to perform an extremely explosive experiment on him. Now, some Big Mek by the name of Mogrok is in command of the Red Waaagh!. Then again, later in the campaign, the hulk of his gutted Battlewagon is found by some Orks, and it turns out that one of its passengers wasn't so dead after all...
On the tabletop, he's represented by a vanilla Warboss with 'Eavy Armour, a Power Klaw that has the Shred special rule, an Attack Squig, and a Combi-Rokkit. The only big differences between the two is that Grukk has a stock 5+ Feel no Pain roll and the special Power Klaw. His general Warlord Trait is Bellowing Tyrant. All in all, not a bad character, and you could probably proxy his model as a normal Warboss, too.