I have just discovered he used to sing "Unchained melody" and in my opinion showed his limitations there as a singer. However, I spotted this comment after the recording on YouTube from a man with a different point of view:
mak whiting: "This is the original version by Jimmy, sung the way it should be sung- before the Righteous Brothers got hold of it and "murdered it"
Will come back with a link for US forum members, as I knew you'd struggle with this one - Jimmy Young did have an amazing relationship with Terry Wogan, who died fairly recently - people used to tune in just to hear their handovers on BBC radio 2 - they were so funny and Jimmy didn't do badly keeping up with Terry's inimitable wit (you've heard of Terry Wogan right?)