The Monks and The Clean probably would not belong on classic rock radio. But Orange Juice is tuneful, upbeat pop music. I think they'd be radio friendly. I mean, you hear a couple of Edwyn Collins songs from time to time. His solo output isn't too far a departure from his work with Orange Juice.
I think that the problem with compiling a list such as this is that is very subjective. I may think that the Monks, The Clean, and Orange Juice should be more popular. But someone else may think they're garbage. As you said, the interests of music nerds and the interests of casual radio listeners do not necessarily jive.