The reality is that different classes would work best for different aspects of organized crime. Allow me to share a few of the more notorious members of a powerful Changeling syndicate in one of the larger cities in my own campaign, the Black Hand.
JIMMY LOCKE (Changeling Spellthief 7/Trapsmith 5): Jimmy is the Hand's primary "boxman." He's a master of locks and traps, and also takes advantage of his trapsmith spell list to make wands of Dimension Door, Fabricate, and similar spells for use by Hand members. On the rare occasion when he triggers a magical trap, his Absorb Spell ability comes in handy.
CRUNCH (Changeling Wildshape Ranger 5/Master of Many Forms 7): "Crunch" is probably the most feared of the guild's heavies. A recalcitrant shop owner never knows when the sweet little old lady who just hobbled in will turn into a War Troll, trash the shop, and be gone before the guards can arrive...and in the form of another innocuous person, a stray dog, or gods only know what else. He also handles assassinations when necessary. Most wealthy citizens have realized that it's cheaper to play ball and pay protection than it would be to pay for defenses that have a chance of stopping the Hand's shapeshifting engine of death.
LADY MONDEGREEN (Changeling Bard 10/Sublime Chord 2): Lady Mondegreen runs a series of brothels catering to specialized clients. She's also in charge of the Hand's blackmail operations, and has dirt on most of the more prominent folks in town. She also maintains a second identity as Vela Darr, an extremely well-to-do merchant who handles large monetary transactions, and has a great deal of financial and political influence.
