Gilbert O’Sullivan had six records in the US Hot 100. Following “Alone Again” were:
Clair - #2 (2 weeks) 10-72
Out Of The Question - #17 03-73
Get Down - #7 06-73
Ooh Baby - #25 10-73
Happiness Is Me And You - #62 03-74
And then, one presumes, he went back to being just Ray. I’ve never heard the last single on his list.
I don’t have any books on the UK charts. It’s possible that he had some more hits in England. Hopefully, someone from Over 'Ome will be reading this.
For underappreciated, I nominate Emitt Rhodes. If you like pop music and you’ve never heard anything by Emitt Rhodes, it’s not surprising. But you should make an effort to check his albums out. They are masterpieces at their best, and still polished and craftsmanlike even when they weren’t brilliant. He played most or all of the instruments, and sang all the voices on his albums. Prior to his abbreviated solo career in the '70s, he was with a group called “The Merry Go Round.” Those albums are worth finding, too, if just to hear Emitt before he got his groove on. It’s like, he was finding his style, but he had other people in the way who didn’t totally share his vision. It would take a few years, but he would make music the way it sounded in his head. We would all be better off for it.