13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Rot Hide Graverobber6–7Tirisfal Glades
Rot Hide Savage18–19Silverpine Forest
Raging Rot Hide18–19Silverpine Forest
Rot Hide Bruiser22Silverpine Forest
Lillith Nefara12Tirisfal Glades
Thule Ravenclaw24Silverpine Forest
Snarlmane23Silverpine Forest
Servant of Azora10Elwynn Forest
Rane Yorick15DeathstalkerSilverpine Forest
Quinn Yorick14DeathstalkerSilverpine Forest
High Executor Hadrec30Silverpine Forest
Lake Skulker15–16Silverpine Forest
Elder Lake Skulker16Silverpine Forest
Lake Creeper17–18Silverpine Forest
Elder Lake Creeper18–19Silverpine Forest
Vile Fin Shorecreeper16–17Silverpine Forest
Vile Fin Tidecaller17–18Silverpine Forest
Mountaineer Barleybrew20Dun Morogh
Pilot Hammerfoot17Dun Morogh
Mangeclaw11Dun Morogh
Vidra Hearthstove10Loch Modan
Mountaineer Thalos15Dun Morogh
Ivar the Foul13Silverpine Forest
Grimson the Pale15Silverpine Forest
Ravenclaw Guardian20–21Silverpine Forest
Ravenclaw Drudger19–20Silverpine Forest
Eastvale Lumberjack8Elwynn Forest
Stormwind City Patroller55Stormwind City
Senator Mehr Stonehallow50Dun Morogh
Deathstalker Erland11Silverpine Forest
Dark Iron Ambusher10Loch Modan
Nightlash14Silverpine Forest
Young Thistle Boar1–2Teldrassil
Thistle Boar2–3Teldrassil
Webwood Spider3–4Teldrassil
Grell2–3Teldrassil
Grellkin3–4Teldrassil
Gremlin3–4
Tarindrella7Teldrassil
Greenpaw10Teldrassil

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.