Hell, even minor characters like Loud Howard, The Boss's Boss, Techno-Bill or Phil, Prince of Insufficient light would all be obviously considered offensive. The only character who doesn't have a glaring personality flaw is Ted the Generic Guy, and he exists primarily to be fired or hurt.
Dilbert: socially inept, constantly taken advantage of
Alice: prone to fits of rage
Wally: professionally lazy
Asok: naive and poor
Carol: low-key psychopath
Pointy Haired Boss: Unscrupulous moron undeserving of his status
Dogbert: conniving exploiter
Catbert: sadist
Yeah, it's hard to imagine who you could make black without pissing people off. Galbrush Effect in force.
Hell, even minor characters like Loud Howard, The Boss's Boss, Techno-Bill or Phil, Prince of Insufficient light would all be obviously considered offensive. The only character who doesn't have a glaring personality flaw is Ted the Generic Guy, and he exists primarily to be fired or hurt.