Who are the best singers from the 1970s?

Aretha Franklin

Marvin GayeStevei NicksAl Green

David Bowie

Roger Daltrey

Robert PlantJames BrownFreddy MercuryAl GreenMarvin GayeJustin HaywardPaul SimonGary NumanGeorge HarrisonRod StewartDon van VlietArt GarfunkelBob MarleyMichael JacksonDionne WarwickKaren CarpenterDiana RossJoan BaezGrace Slick

Agnetha Faltskog

Ann-Frid Lyngstad

Whoever you think they are, that's the best to you. There's no such thing as the best. By what criteria do you judge who is the best at anything? 

Donny  Osmond. 

There were hundreds of them. Here are a few:

Elvis Presley

Creedence Clearwater Revival

Stevie Wonder

Marvin Gaye

Ray Charles

Pink Floyd

The Eagles

Queen

Def Leopard

Bee Gees

Gladys Knight and The Pips

Earth Wind and Fire

The Jackson 5

Chicago

Kiss

Lynard Skynard

Aerosmith

Rod Stewart

Ike and Tina Turner

The Beach Boys

Crosby Stills Nash and Young

Deep Purple

Three Dog Night

Commodores

AC/DC

Yes

ZZ Top

Bad Company

Journey

Foreigner

Van Halen

Styx

Supertramp

Genesis

Janis Joplin

The Carpenters

Linda Ronstadt

Diana Ross

Cheap Trick

Chuck Berry

That is just a few of them. There are Hundreds more.

There are more great voices to choose from in that decade than I have time to list.  In my opinion, the worst singer from the seventies era is head and shoulders above any vocalist of present day.  There was no “AutoTune” or other computer assistance.

Greatest of the Great?

Female: Karen Carpenter

Male: Ray Charles

The ones I usually highlight are some that don’t get nearly enough attention:

Female: Gladys Knight (Midnight Train to Georgia)

Male: Bobby “Blue” Bland (enjoy this legend in the link)

https://youtu.be/WcF8Aos4XDA

There’s so many.

Depends what genre you like. 

Karen Carpenter

Freddie Mercury

Marvin Gaye

Etc