13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Skeletal Fiend24–25Duskwood
Nightbane Shadow Weaver27–28Duskwood
Nefaru34Duskwood
Pygmy Venom Web Spider18–19Duskwood
Nalesette Wildbringer40Pet TrainerFelwood
Murloc Nightcrawler21–22Redridge Mountains
Murloc Tidecaller19–20Redridge Mountains
Great Goretusk16–17Redridge Mountains
Murloc Minor Tidecaller17–18Redridge Mountains
Defias Messenger14–15Westfall
Rabid Dire Wolf20–21Duskwood
V'rex19
Blacknails15
Shadowhide Warrior24–25Redridge Mountains
Green Recluse21–22Duskwood
Brain Eater28–29Duskwood
Leprithus19Westfall
Foe Reaper 400020Westfall
Naraxis27Duskwood
Watcher Ladimore28The Night WatchDuskwood
Murloc Scout19–20Redridge Mountains
Shadowhide Assassin23–24Redridge Mountains
Redridge Drudger20–21Redridge Mountains
Old Blanchy2Westfall
Defias Ambusher8–9Elwynn Forest
Kazon27Redridge Mountains
Bloodscalp Warrior33–34Stranglethorn Vale
Bloodscalp Scout34–35Stranglethorn Vale
Defias Pillager14–15Westfall
Defias Looter13–14Westfall
Defias Henchman15–16Westfall
Bloodscalp Hunter34–35Stranglethorn Vale
Brainwashed Noble18Westfall
Bloodscalp Berserker36–37Stranglethorn Vale
Defias Miner18The Deadmines
Marisa du'Paige18Westfall
Grimtooth59Alterac Valley
Plague Spreader27–28Duskwood
Blackrock Tracker23–24Redridge Mountains
Chatter23Redridge Mountains

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.