Andy Bernard
According to Dwight Schrute, Andy is the worst salesman at Dunder Mifflin Scranton on The Office—in his words, even worse than Phyllis. Despite his terrible job performance, Andy is promoted to Regional Manager after Michael departs the company, only to be fired later. Although he returns to the position, his lack of professionalism causes him to leave the role once again.
Raddimus
All of the restaurant employees in 2005's Waiting... are terrible, but one stands out among the rest. Raddimus, played by Luis Guzmán, makes sure to add extra "seasoning" to orders returned to the kitchen by unsatisfied customers, as well as sleeping with someone in the men's restroom.