I hardly call a radio host with rating of less than 1 “successful.” I usually listen to a segment on my morning commute. It’s that or the moronic The Fan.
I heard him guest host for Rush and was unimpressed. Not a great mind. Also, he needs to take something to clear his sinuses, and be less full of himself. (Not as bad as Hannity, and not the over the top schtick that both Rush and Trump employ, but boring and unearned).
I listen to Mark Davis every morning via iHeart in San Antonio. I think he’s intelligent, articulate and well-reasoned. He’s a little goofy at times, but is a rock solid conservative.