13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Sentinel Shayla Nightbreeze8Teldrassil
Cracked Golem18–19Darkshore
Stone Behemoth19–20Darkshore
Gravelflint Scout18–19Darkshore
Gravelflint Bonesnapper19–20Darkshore
Gravelflint Geomancer21Darkshore
Agal8Teldrassil
Thistle Bear11–12Darkshore
Rabid Thistle Bear13–14Darkshore
Grizzled Thistle Bear16–17Darkshore
Oakenscowl9Teldrassil
Blackwood Pathfinder12–13Darkshore
Blackwood Warrior16–17Darkshore
Blackwood Totemic17–18Darkshore
Blackwood Ursa18–19Darkshore
Blackwood Shaman19–20Darkshore
Strider Clutchmother20Darkshore
Reef Frenzy14–15Silverpine Forest
Coastal Frenzy14–15Darkshore
Shadowclaw13Darkshore
Cursed Highborne10–11Darkshore
Writhing Highborne11–12Darkshore
Wailing Highborne12–13Darkshore
Stormscale Wave Rider15–16Darkshore
Stormscale Siren16–17Darkshore
Stormscale Myrmidon18–19Darkshore
Stormscale Sorceress19–20Darkshore
Stormscale Warrior20–21Darkshore
Lady Moongazer17Darkshore
Darkshore Thresher12–14Darkshore
Carnivous the Breaker16Darkshore
Elder Darkshore Thresher16–18Darkshore
Deep Sea Threshadon25
Vile Sprite10–11Darkshore
Wild Grell11–12Darkshore
Licillin14Darkshore
Firecaller Radison19Darkshore
Crier Goodman3Stormwind City
Greymist Raider11–12Darkshore
Greymist Coastrunner12–13Darkshore

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.