Tom Rush's first (eponymous) album included tunes by both Chuck Berry ("Too Much Monkey Business") and Bo Diddly ("Who Do You Love?"), along with eight or ten of the more traditional folk/blues numbers one would normally expect of a "folksinger."

I always enjoyed that album, and thought highly of Rush for recording the songs he enjoyed, regardless of how the "purists" of that era might react.

This was in the early-to-mid-60s, at the peak of the "folk revival" and years before Dylan went electric and people began using the phrase "folk-rock."