13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Amnennar the Coldbringer41Razorfen Downs
Dun Garok Soldier28–30Hillsbrad Foothills
Grubbis32Gnomeregan
Kum'isha the Collector60Blasted Lands
Deadwind Brute55–56Deadwind Pass
Restless Shade58–60Deadwind Pass
Deadwind Mauler56–57Deadwind Pass
Deadwind Warlock57–58Deadwind Pass
Deadwind Enforcer59–60
Sky Shadow55–56Deadwind Pass
Deadwind Ogre Mage55–57Deadwind Pass
Silver Tabby1Elwynn Forest
Orange Tabby1Elwynn Forest
Cornish Rex1Elwynn Forest
Bombay1Elwynn Forest
White Kitten1Stormwind City
Senegal1Stranglethorn Vale
Cockatiel1Stranglethorn Vale
Cockroach1Undercity
Earthen Stonebreaker44–45Uldaman
Earthen Stonecarver44–45Uldaman
Galak Flame Guard30Thousand Needles
Deadly Cleft Scorpid42–43Uldaman
Oglethorpe Obnoticus50Master Gnome EngineerStranglethorn Vale
Chief Engineer Bilgewhizzle50Gadgetzan Water Co.Tanaris
Spigot Operator Luglunket40Gadgetzan Water Co.Tanaris
Thelman Slatefist61Alterac Valley BattlemasterStormwind City
Taim Ragetotem61Alterac Valley BattlemasterThunder Bluff
Frostmaul Giant59–60Winterspring
Frostmaul Preserver59–60Winterspring
Frostsaber Cub55–56Winterspring
Frostsaber56–57Winterspring
Frostsaber Stalker59–60Winterspring
Frostsaber Huntress58–59Winterspring
Frostsaber Pride Watcher59–60Winterspring
Cobalt Wyrmkin55–56Winterspring
Cobalt Scalebane56–57Winterspring
Cobalt Mageweaver57–58Winterspring
Winterfall Ursa57–58Winterspring
Winterfall Shaman56–57Winterspring

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.