I've always loved Bob Dylan, both for the quality of his voice and his lyrics.
Of course, the voice is now a shadow of its former self but somehow, for me, the old Dylan charisma remains.
There are countless good voices about but only a few have that certain something which makes them stand out from the rest.
Incidentally, Johny Cash did something similar. On an album he brought out just before he died, his voice is wobbly and without any power but somehow there is a poignant quality. I always feel emotional when I listen to it.