At the end of each year, a Salon writer lists the major media hacks, a hack defined as someone who produces low quality, high volume material intended to boost sales and to express a client's political opinions.
He's in the process of building this year's list (click here for his entry on MSNBC - number 8 on the list), and provides links to recent efforts. Here's 2010 and 2011.
Number one is Politico (click here for its website).