Jeri -- I had a lightbulb moment (for a good singer in mythology)!

Orpheus!

He was the one who outsang the sirens, and even soften the heart of Death himself with his song ... and legend says that he tamed wild animals with his song, and that evem rocks would leave their places to get closer and listen. ...He met an unfortunate end, but eventually became the central figure in an Ancient Greek mystery religion...

If you want your singer to be female, you could have her be the sister or daughter of Orpheus ...

Just a thought... though the lines would scan differently...