13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Shanda the Spinner19Loch Modan
Emogg the Crusher19Loch Modan
Lord Condar16Loch Modan
Seeker Aqualon21Redridge Mountains
Squiddic19Redridge Mountains
Ribchaser17Redridge Mountains
Snarlflare18Redridge Mountains
Boulderheart25Redridge Mountains
Tamra Stormpike28Hillsbrad Foothills
Scargil30Hillsbrad Foothills
Lady Zephris33Hillsbrad Foothills
Ro'Bark28Hillsbrad Foothills
Creepthess24Hillsbrad Foothills
Big Samras27Hillsbrad Foothills
Jimmy the Bleeder23Alterac Mountains
Frostwolf Bloodhound53–54Alterac Valley
Stormpike Owl53–54Alterac Valley
Stormpike Battleguard59Alterac Valley
Frostwolf Battleguard61Alterac Valley
Brinna Valanaar43BowyerAzshara
Petrified Guardian57–59Dire Maul
Kor'kron Elite60Orgrimmar
Human Orphan4Stormwind City
Ferra60Dire Maul
Guard Fengus59Dire Maul
Stomper Kreeg59The DrunkDire Maul
Guard Slip'kik59Dire Maul
Cho'Rush the Observer60Dire Maul
Captain Kromcrush61Dire Maul
Guard Mol'dar59Dire Maul
Lethtendris57Dire Maul
Field Repair Bot 74A50
Knot Thimblejack50Dire Maul
Death Howl49Felwood
Alshirr Banebreath54Felwood
Ragepaw51Felwood
Olm the Wise52Felwood
Mongress50Felwood
The Ongar51Felwood
Highlord Demitrian62Silithus

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.