Darghashkas
Darghashkas is somewhat of an anomaly among the Wookiee race, in that he has no sense of honor whatsoever. He fled his home planet of Kashyyyk at a young age, after brutally killing his family. If asked why he committed such a horrible act, Darghashkas will say he simply felt like it.
Taking over a small freighter after killing its captain, Darghashkas fled Kashyyyk and spent many years hopping aimlessly from system to system, taking on various unsavory jobs. When the Empire came into power, he offered his services to them as a mercenary. To keep himself out of shackles, Darghashkas betrayed many of his fellow Wookiees into a life of slavery.
After the fall of the Empire, Darghashkas found himself on the run from the New Republic. He has a permanent base of operations on Nar Shaddaa, and continues to work as a mercenary to this day.
Click on the image of Darghashkas for a larger picture)