Tom Wait
Uh, wait for what? Wait for Godot? Wait a table?
But seriously, I don't understand why a gravelly voice like Tom Waits or the nasal voice of Bob Dylan dispels so many. I once had a friend who boasted of his pitch perfect singing voice (which he did not really have), loved CSN&Y for their beautiful harmonies, and loved to express his hatred for Bob Dylan's nasal voice. Well guess what, I find CSN&Y incredibly boring.
Bob Dylan is quoted often for things he probably did not really say, but one of those quotes is along the lines of "I can do more with my limited voice than most singers can do with their perfect voices" and he was right.
Let me also say this-flaws add character. Perfection is often boring. Donald Fagen of Steely Dan pretty much ruined most of Steely Dan's best records by seeking perfection in the studio. Without a few rough edges here and there the sound is lackluster.
Just my thoughts. Lou Reed was hardly a great singer but his recordings have withstood the test of time. Same with Iggy Pop and countless others.