13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Prospector Remtravel16Explorers' LeagueDarkshore
Advisor Belgrum40Ironforge
Fam'retor Guardian45Badlands
Lucien Tosselwrench31Badlands
Lotwil Veriatus36Badlands
Servo5Badlands
Mangy Silvermane41–42The Hinterlands
Silvermane Wolf43–44The Hinterlands
Silvermane Howler45–46The Hinterlands
Silvermane Stalker47–48The Hinterlands
Vicious Owlbeast42–43The Hinterlands
Primitive Owlbeast44–45The Hinterlands
Savage Owlbeast46–47The Hinterlands
Sentinel Glynda Nal'Shea45Darkshore
Zaricotl55–56Badlands
Magregan Deepshadow38Badlands
Keeper Bel'dugur42Undercity
Dagun the Ravenous43Dustwallow Marsh
Lanie Reed55Gryphon MasterSearing Gorge
Ransin Donner35Ironforge
Boss Tho'grun41–42Badlands
Murdaloc42Badlands
Harken Windtotem21Mulgore
Mull Thunderhorn25Mulgore
Palemane Tanner5–6Mulgore
Palemane Skinner6–7Mulgore
Palemane Poacher7–8Mulgore
Bristleback Quilboar3–4Mulgore
Bristleback Shaman3–4Mulgore
Bristleback Battleboar4–5Mulgore
Plainstrider1–2Mulgore
Adult Plainstrider6–8Mulgore
Elder Plainstrider8–9Mulgore
Prairie Wolf5–6Mulgore
Prairie Stalker7–8Mulgore
Prairie Wolf Alpha9–10Mulgore
Mountain Cougar3Mulgore
Windfury Harpy7–8Mulgore
Windfury Wind Witch8–9Mulgore
Windfury Sorceress9–10Mulgore

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.