He had a lead role in the Broadway production of Hair and scored a top ten single in 1970 with "(If You Let Me Make Love to You Then) Why Can't I Touch You?"
In 1971, his cover, "When You Get Right Down to It", was a more dramatic version of a song that had been a hit the previous year for the Delfonics; it reached number 34 on the UK Singles Chart in December.
Dyson remained with Columbia working with top-line producers for another three albums, The More You Do It (1976), Love in All Flavors (1977) and If the Shoe Fits (1979).
His acting and singing career had begun to stall in the late 1970s due to ill health, and it was in 1983 that Dyson appeared on the R&B chart for the last time on Cotillion with "All Over Your Face".
[1] A posthumous release on Society Hill Records appeared in 1991, when a duet with Vicki Austin, "Are We So Far Apart (We Can't Talk Anymore)", dented the US R&B chart, reaching number 79 during a five-week run.