Destroyer of the moot, slayer of emperors and wiper of imperial provinces, Gorbad Ironclaw is a greenskin with his ego only matched by his myriad of achievements and hulking form. Like all orcs, Gorbad is intelectually lessened, but where he lacks in brain he makes up for in brawn and unending ferocity and warlust. As expected of warhammer orcs, Gorbad's performance is likened to that of a football hooligan, but one that leads the rioting crowd in the search for a good scrap.
Like ogres, greenskins generally speak with a brutish and almost comical version of the british cockney accent. (Though don't worry about *being* british, the accents are very much parody)

Reference: https://www.youtube.com/watch?v=-TrQtMCwjjo

Note: Due to the nature of the voice, there will be some post-processing done for any and all orc characters, so don't worry too much about having a deep enough voice. Though the less editing needed the better.