Tough question, but let's give it a shot:
(1) WRCT-88.3's Saturday Light Brigade, which may be the only show of its kind, providing a family-friendly variety that is hard to match.
(2) Radio 9, also on WRCT, which blends oldies with a disc jockey presentation that simultaneously is campy and professional.
(3) Rocco DeMaro, who makes Extra Innings worth listening on WPGB-104.7 even for as lousy as the Pirates once again have been this year.