A collection for the Undead Monster Girls here.
Dullahan: http://monstergirlencyclopedia.wikia.com/wiki/Dullahan
Ghost: http://monstergirlencyclopedia.wikia.com/wiki/Ghost
Ghoul: http://monstergirlencyclopedia.wikia.com/wiki/Ghoul
Lich: http://monstergirlencyclopedia.wikia.com/wiki/Lich
Mummy: http://monstergirlencyclopedia.wikia.com/wiki/Mummy
Nereid: http://monstergirlencyclopedia.wikia.com/wiki/Nereid (not obvious, but they are created from women who have drowned)
Skeleton: http://monstergirlencyclopedia.wikia.com/wiki/Skeleton
Vampire: http://monstergirlencyclopedia.wikia.com/wiki/Vampire
Wight: http://monstergirlencyclopedia.wikia.com/wiki/Wight
Zombie: http://monstergirlencyclopedia.wikia.com/wiki/Zombie