I would say he was better known as a pop singer in the 80s than a 60s/70s jazz guitarist. Chart topper was meant tongue-in-cheek but he did very well in his "second" career and made more money than ever. Actually maybe not so tongue-in-cheek,back in the 80s he had several top 10 hits in the US charts and UK charts including two number ones in the US R&B chart. So yes, 80's chart topper who sang.