As Hamish says, the UK pop charts in the early 1960s, prior to the takeover by guitar/drum combos in the wake of the Beatles, seemed to be filled with a great variety of music. Much of it would be called "easy listening" these days - ballads by male or female solo singers, instrumentals by Russ Conway, Acker Bilk, etc., and trad jazz by the likes of Acker (again, but in different vein!), Kenny Ball, etc. Then there were novelty or comic songs by the likes of Bernard Cribbins, Anthony Newley, and others. And of course the rock 'n' roll type pop from Cliff & The Shadows, Elvis and others, followed by all those beat groups.

Even today you get the occasional record in the charts that seems out of place/time, but tghey are rarer than they once were. I guess that the record buying public didn't care as much about whether the music they liked was 'cool' or not, as they seem to do today.