Excellent thread, when I was younger I used make these lists up in my head in case someone would ask me (silly I know) but now i actually had to think about it.
Here's mine in no particular order.
1. Tori Amos
2. Kent
3. Sophie Zelmani
4. Rammstein
5. Sarah MacLachlan
6. Depeche Mode
7. Sisters of Mercy
8. Pink Floyd
9. Air
10. Simon & Garfunkel