10. Vierna Do'Urden
Vierna is a rare drow. As a priestess, she is expected to be horrible and evil; sometimes, however, a little bit of her calmer, nicer inner self shows through, and she's not such a bad person after all. Then she goes crazy and turns her brother into a drider, and you can forget about her being nice ever again.
9. Quenthel Baenre
A high priestess of the Spider Queen, Quenthel is very dedicated. She is completely dispassionate towards her fellow drow, and maintains her faith through very difficult trials.
8. Lord Dyrr
Dyrr is a lich. He's amazingly powerful and wants even more power all the time. He doesn't care at all who gets in his way.
7. Halisstra Melarn
I really liked Zaknafein's presence in the Legend of Drizzt series. He is a father figure, a master trainer, and a friend, yet the empathy he clearly possesses has been suppressed due to the violent and evil he lives in. He is a good-hearted character who lives a miserable existence to survive, and he does his best to make sure Drizzt doesn't succumb to the evil ways of the drow. Even when manipulated by powerful magic, he refuses to kill his son, and destroys himself instead.
Ryld is a weapons master who isn't a particularly interesting character until he abandons his life in Menzoberranzan to settle down in peace and love on the surface. His empathy is unusual for a drow, and it is even more unusual that he acted upon those emotions and gave up his old lifestyle simply for love. Even when betrayed, he has no regrets.
The leader of a band of rogues, Jarlaxle is one of the most influential male drow in Menzoberranzan. His presence is tolerated and even approved by the Spider Queen herself. He has a wide array of magical items that give him a huge assortment of abilities. He never runs out of tricks, and often uses illusions to his advantage. He's eccentric, brilliant, and highly resourceful.
The archmage of the largest drow city, Menzoberranzan, is Gromph. He's got tons of power, tons of influence (especially for a male drow), and tons of crazy secrets. He fights Lord Dyrr at some point, and the battle is stretched over two books (probably about 8 chapters in total) just because they kept outdoing each other. Gromph has a typical lack of compassion and a total disregard for anyone who gets in his way.