I'm not sure I could out do that last answer, but I have some suggestions.
One of the most popular darkwave bands is probably The Cruxshadows. Their newer music gets a bit industrial, but anything bassicly before DreamCypher is more darkwave. The music is good, but is in no comparision to the lyrics. Brilliant and poetic.
And, if you like them, Ego Likeness might be another band worth checking out. Donna's voice has got to be one of my all time favorite female vocalists!
The Last Dance is a darkwave band, and is practicly a legend. With soothing untreated vocals, they are creative and powerful.
Behind the Scenes is borderline darkwave, they are a tad more to the goth rock side. But, still a good band. Not phonominal, but decent. If you are going to check out any song from them, listen to Human, from the album Homeless.
ThouShaltNot is a brilliant band that has dabbed with the darkwave genres. The Holiness of Now and The White Beyond are deffinatly the two albums to look for if your looking for darkwave. Alex Reed has a beautiful, classically trained voice. He can cover a varried range of pitches. Not only can he sing, but his ability to write lyrics are even more fantastic. His lyrics are philisophical and catchy. But, be fair warned, this band will make you think a lot.
Oh, and I cannot forget the obvious chioce, Switchblade Symphony. Probably one of the first bands to be concitered darkwave. Gods of the genre, in a way.