My local guys piss me off the most, but most of you have probably never heard of them, and its mostly because I have to listen to them several times a week.
Nationally: Anybody and I do mean ANYBODY from ESPN (thank God Joe Morgan's contract wasn't renewed), the douches from MLB TV's "Intentional Talk," Mitch Williams at times, Joe Buck, Ken Rosenthal, Eric Karros, Josh Lewin (Pretty much everybody at Fox), Dan Fouts, Ian Eagle, Spiro Dedes, Matt Millen, Deion Sanders, and most of all, that guy that calls the White Sox games, with his "He gon'!" and "You can put it on the booooard...." nonsense, I don't care to look up his name, he's garbage.