lets hope you live that long., another 72 years Joe
, if the melody is good it will stand on its own. no tune is driven by harmony, harmony can add something if it is good it can also feck it up, that all depends how good the harmony is.
but a good tune will stand on its own without accompaniment if the singer is good..
Stephen Foster wrote some great tunes they work unaccompanied and with harmony.
listen to Brigg Fair, sung by joseph taylor then listen to Percy Graingers arrangements, both work, because both knew what they were ding , one as a singer and the other as n arranger.