Until fairly recently, about the biggest Glenn Beck basher around was Mark Levin. He bashed Beck as often as he bashed Michael Savage. And then Levin and Beck had some sort of meeting of the minds.
That's my recollection, too. Levin had a demeaning nickname for other talk show hosts and spent a lot of time criticizing them. Pretty sure Savage, and Beck, and he had a nickname for Hannity, too IIRC. (I never decoded the nicknames). Levin would call them all "backbenchers"
For years, until now, I was fine listening to Levin, and liked him, though with my grandkids in the car I often had to turn him off, especially when they were little.