I'd also humbly submit Sierra Ferrell: not exactly outlaw country, but definitely in the vein of old school country, and she has a voice that is absolutely hypnotizing.
One of her most popular songs that is about love with a healthy dose of morbidity: https://www.youtube.com/watch?v=_2W8kCk1qnU
An absolutely legendary display of what she's capable of with her voice: https://www.youtube.com/watch?v=57Aha_GwFt4
I must be ancient here, because nobody has claimed this is like September 1993 all over again...
https://en.wikipedia.org/wiki/Eternal_September