And How would you number them based off of Live performances.

too much and i'm too lazy to list. the one in my avie is one of

I seperate male and female vocalists often, prefer male voices usually. Regardless.

1. Luther Vandross
2. Bill Withers
3. Marvin Gaye
4. Ella Fitzgerald
5. Aretha Franklin
6. Rod Stewart
7. Stevie Wonder
8. Whitney Houston
9. Daryl Hall
10. Gladys Knight

That's the best I could do

All I know is I'd put Mariah Carey and Kelly Clarkson first

Men

1. Levi Stubbs
2. Michael Jackson
3. Marvin Gaye
4. Luciano Pavarotti
5. Stevie Wonder
6. Jeff Buckley
7. Prince
8. Jim Morrisen
9. Caleb Followill
10 Luke James

Women

1. Aretha Franklin
2. Mariah Carey
3. Beyoncé
4. Whitney Houston
5. Dinah Washington
6. Leontyne Price
7. Ingeborg Hallstein
8. Lara Fabian
9. Barbra Streisand
10 Asala Nasri

Teena Marie
Toni Braxton
Mariah Carey
Whitney Houston
Amy Winehouse
Christina Aguilera
Beyoncé Knowles
Selena
Dinah Washington
JoJo

Males:
Donny Hathaway
Steve Perry
Freddie Mercury
K-Ci (of Jodeci)
Prince
Usher
David Cook
Maxwell
Axl Rose
Sam Smith