Asuka Langley Sohryu (Evangelion), Louise (Zero No Tsukaima), Horo (Spice and Wolf), Hitagi (Bakemonogatari, and yes she is a tsudnere, just an old 80's type), Sheryl (Macross Frontier), Naru (Love Hina), Eri (School Rumble)
Well,i think the most tsundere in my favourites is Serizawa Fumino from Mayoi Neko Overrun..Next is Misaka Mikoto from To Aru Kagaku No Railgun.
Of course,the famous 4 Queen Tsunderes in anime were my favourite too...did i hav to mention who are they?guess not since everyone from this club should be able to guess..lol..
An online poll from Japanese website biglobe.jp asked for the top ten tsundere. Couple of suprises on the list
1. Taiga Aisaka (Toradora!)
2. Mikoto Misaka (To Aru)
3. Aria Kanzaki (Hidan no Aria)
4. Fumino Serizawa (Neko Overrun)
5. Victorique de Broix (Gosick)
6. Kirino Kousaka (Ore no Imouto)
7. Louise Françoise le Blanc de la Vallière (Zero no Tsukaima)
8. Azusa Nakano (K-ON!) (debatable)
9. Hinagiku Katsura (Hayate no Gotoku)
10. Ryouko Ohkami (Ookami-san)