Dude, Golden Teardrops is amazing! Then again, The Flamingos are seriously the best vocalists of the doo-wop era for me.
How about...
Etta James - Stormy Weather, and At Last, which on some days I consider the sexiest song ever written.
The Orioles - It's Too Soon To Know
Dusty Springfield - The Look Of Love, which on every other day I consider the sexiest song ever written.
When Something is Wrong With My Baby - Sam & Dave
Every single ballad Otis Redding ever sung

For a modern touch, Solomon Burke's Don't Give Up On Me.
Any best of for Al Green.
