Favourite Vinyl female and male vocals

For Female vocals, Stacey Kent may be right up your alley. Jennifer Warnes is one of my favorites (Famous Blue Raincoat or The Well). A favorite of many here is Eva Cassidy.

For Male vocals it is hard to recommend as you gave us no clue what sort of things you like. Old, new, jazz, rock, etc.

A few of my favorites that are generally well recorded are: Jack Johnson, and Harry Belefonte. The Muddy Waters lp sounds amazing as well.

Ella on anything, really. Sarah, of course. But my favorite vocal is a Johnny Hartman LP on BeeHive label. (I think it's a low-end offshoot of Bethlehem.) It was recorded not too long before Hartman's death in the early 80s. I don't recall the title, but the first cut is "Living for You". Every cartridge I test must negotiate that LP with authority. There is a piano accompaniment that sounds either electric or acoustic, depending on the tt, tonearm, cartridge. I have finally figured out it is acoustic. Hartman is at his best, IMO, and the sonics are great despite the budget label.

In order:
Ella, Patsy Cline, Alison Krauss, K.D.Lang, Diana Krall,
Etta James, Peggy Lee.
Bobby Darin, Elvis, Frank, Nat King Cole, James Taylor,
Sting.
The Ladies do more for me.

Kate Bush - The Hounds of Love

Jennifer Warnes and Eva Cassidy are two of my favorites. Fantastic voices and involving lyrics.