ok so I found this cappella group, not normally my thing, but some very good harmonies here. if you like christmas songs, they have a bunch of them too and even a song with Dolly Parton
Hallelujah (cover) - Pentatonix
https://youtu.be/LRP8d7hhpoQ
Hallelujah (cover) - Pentatonix
https://youtu.be/LRP8d7hhpoQ