A great song is open to a lot of different interpretations/versions. I think "Unchained Melody" is a great song. There are more than 1500 recorded versions of that song, and MANY are worthy of being played even if the Righteous Bros. version is generally regarded as the standard bearer. I have a number of the Righteous Bros. albums, including original release vinyl, but, that does not mean I don't like other versions of their biggest hit. For example, I frequently listen to this version from 1960:
https://www.youtube.com/watch?v=fV8XwoIGo5M
https://www.youtube.com/watch?v=fV8XwoIGo5M