You know better than to think "Only You" is traditional, leeneia. It's certainly a Doo Wop classic, but it has a known composer, Buck Ram, and it was published in 1954 - which is well within recorded history. But it's a good song.
Buck Ram also wrote The Great Pretender which is also not a traditional song.
But hey, both songs have a Wikipedia page:
https://en.wikipedia.org/wiki/Only_You_(And_You_Alone)