Here's a list of all the dead/monster deities listed in the Faiths of Faerûn section.
Dead Deities
Amaunator: Law, Nobility, Planning, Sun, Time.
Bhaal: Death, Destruction, Evil, Retribution.
Ibrandul: Cavern, Darkness, Scalykind, Travel.
Moander: Corruption, Destruction, Evil, Slime.
Myrkul: Death, Evil, Suffering, Undeath.Monster deities
Annam: Knowledge, Magic, Plant, Rune, Sun.
Baphomet: Animal, Chaos, Evil, Hatred, Retribution.
Blipdoolpoolp: Blackwater, Destruction, Evil, Water.
Diirinka: Chaos, Destruction, Dream, Dwarf, Evil, Suffering, Trickery.
Great Mother: Chaos, Death, Evil, Hatred, Strength.
Grolantor: Chaos, Death, Earth, Evil, Hatred.
Hiatea: Animal, Good, Family, Moon, Plant, Sun.
Hlal: Chaos, Dragon, Good, Trickery, Rune.
Hruggek: Chaos, Evil, Trickery, War.
Iallanis: Good, Healing, Strength, Sun.
Ilsensine: Evil, Law, Knowledge, Magic, Mentalism, Mind, Slime, Tyranny.
Kurtulmak: Earth, Evil, Hatred, Law, Scalykind, War.
Laogzed: Chaos, Death, Destruction, Slime.
Maglubiyet: Destruction, Evil, Planning, Trickery.
Memnor: Death, Evil, Knowledge, Mentalism, Rune, Trickery.
Null: Death, Dragon, Fate, Knowledge, Law.
Orcus: Chaos, Death, Evil, Undeath.
Pazrael: Air, Chaos, Charm, Demonic, Evil.
Sekolah: Blackwater, Evil, Law, Ocean, Strength, Tyranny, War.
Skoraeus Stonebones: Cavern, Earth, Healing, Knowledge, Protection.
Stronmaus: Chaos, Good, Protection, Storm.
Surtr: Evil, Fire, Trickery, War.
Task: Chaos, Dragon, Evil, Planning.
Thrym: Destruction, Evil, Magic, War.
Vaprak: Chaos, Destruction, Evil, War.