13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Greater Obsidian Elemental55–57Burning Steppes
Firegut Ogre50–51Burning Steppes
Firegut Ogre Mage51–52Burning Steppes
Firegut Brute52–53Burning Steppes
Thaurissan Spy53–54Burning Steppes
Thaurissan Firewalker53–55Burning Steppes
Thaurissan Agent54–55Burning Steppes
War Reaver53–55Burning Steppes
Black Dragonspawn52–53Burning Steppes
Black Wyrmkin53–54Burning Steppes
Flamescale Dragonspawn56–57Burning Steppes
Flamescale Wyrmkin57–58Burning Steppes
Black Drake50–52Burning Steppes
Scalding Drake53–55Burning Steppes
Searscale Drake56–58Burning Steppes
Black Broodling51–52Burning Steppes
Scalding Broodling53–54Burning Steppes
Flamescale Broodling55–56Burning Steppes
Defias Drone22Duskwood
Malformed Defias Drone23–24Westfall
Defias Tower Patroller23Westfall
Klaven Mortwake26Westfall
Blackrock Worg54–55Burning Steppes
Defias Tower Sentry24Westfall
Digmaster Shovelphlange38Badlands
Venture Co. Drone22The Barrens
Condemned Acolyte57–58Hillsbrad Foothills
Condemned Monk58–59Hillsbrad Foothills
Condemned Cleric59–60Hillsbrad Foothills
Cursed Paladin57–58Hillsbrad Foothills
Cursed Justicar57–58Hillsbrad Foothills
Arados the Damned35
Judge Thelgram34
Writhing Mage58–59Hillsbrad Foothills
Earthen Guardian44–45Uldaman
Earthen Hallshaper44–45Uldaman
Cleft Scorpid35–36Uldaman
Viscous Fallout30Gnomeregan
Cursed Ooze49–50Felwood
Killian Hagey35Skinning TrainerUndercity

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.