Her best record, Honky Tonk Angel, has been out of print for over 40 yrs, but most of it is included in Up from the Skies: the Polydor Years. She started to devolve pretty quickly after that, but the double-packaged The Real Ellen/Everybody Needs It has more amazing tracks than overkill numbers, so....
I can't say too much cuz there's a NDA involved, but she was signed because a manager heard Hendrix refuse to jam with her anymore because Ellen kept showing him up. She had three flaws - couldnt write, hammered the #### out of every song she performed (she had a stronger voice than Streisand and two octaves more range) and would not take counsel (mostly cuz she was so much more talented - spoke six languages - than everybody) from anyone, esp cuz everyfrikkinfool in the biz wanted to make the next Joplin out of her. I was making progress on that front, but....