I don't mind reverse harem or just normal . . . non reverse harem. As long as the girl isn't too much of a pansy and a damsel in distress, and the male yandere gets he in the end.

http://t3.gstatic.com/images?q=tbn:ANd9GcTspg3HlwQr25Nbo53FbbVsMWZMLEbvXibnYuxrh69HnrCWjtVeAtTFN_ra

Watashi no Megane-kun - The male lead is more yandere than the female lead is, but what made it interesting was that they were both possessive and obsessive about each other instead of it just being one.

Abide in the Wind

• Girl isn't a pansy, but she might come off as annoying. He does get her in the end.

Let's see... Kubera, Inu X Boku SS, Kare Kano, and perhaps American Ghost Jack? I absolutely, absolutely second Thouarttammy's suggestion though.

Cheese in the Trap
Hakuji
Soredemo Sekai wa Utsukushii (Shows it later on)
100% Perfect Girl