13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Spectral Corpse57Eastern Plaguelands
Rattlegore61Scholomance
Taiga Wisemane60Desolace
Cork Gizelton38Desolace
Rigger Gizelton36Desolace
Tamed Kodo34Desolace
Jessica Redpath50Winterspring
Horde Peon26–27Ashenvale
Morloch58Alterac Valley
Molten Giant62Molten Core
Molten Destroyer63Molten Core
Flamewaker62Molten Core
Flamewaker Priest62Molten Core
Flamewaker Healer60Molten Core
Flamewaker Elite62Molten Core
Lava Annihilator61–62Molten Core
Firewalker61–62Molten Core
Flameguard61–62Molten Core
Firelord61–62Molten Core
Flame Imp61–62Molten Core
Core Hound61Molten Core
Core Rager62Molten Core
Ancient Core Hound62Molten Core
Snowblind Windcaller53–54Alterac Valley
Taskmaster Snivvle58Alterac Valley
Snowblind Ambusher52–53Alterac Valley
Winterax Witch Doctor59–60
Horde Scout26–28Ashenvale
Horde Deforester27Ashenvale
Horde Grunt29–30Ashenvale
Horde Shaman28–29Ashenvale
Warsong Shredder27Ashenvale
Maraudine Priest40–42Desolace
Ghostly Raider40–41Desolace
Ghostly Marauder41–42Desolace
Cursed Centaur43Desolace
Gnarlpine Instigator8
Chal Fairwind53Wintersaber TrainersWinterspring
Mannoroc Lasher29–30Ashenvale
Hive'Ashi Stinger57–58Silithus

Classic reference data from QuestieDB (Forever data, commit c5de61a), with positions on Forever's zone maps. It doesn't confirm that an NPC, location, quest or item is in Forever.