The acts that get regular airplay or are part of pop culture now, but never managed even a single chart hit at the time. Some have the same trivia-question status of a true one-hit wonder. Some are acts for whom the lack of a hit single became well beside the point.
"This is the death knell for terrestrial radio, right?" That was a daily question in 2004, poised to me constantly by journalists covering the news that Howard Stern was joining the then-Sirius Satellite Radio.