Sheldon "Shelly" Moldoff died February 29, 2012 due to kidney failure.
Moldoff was one those names that was everywhere in the golden age. If you read DC from the time at all it is a legendary name.
Mark Evanier has written an excellent obituary on his blog. I feel that all I can add is love for the Sheldon Moldoff's art work.
Here you will find his art work for the characters he was best known for: Hawkman and Hawkgirl.
From All-Star Comics #7
Script Gardner Fox, Art Sheldon Moldoff