13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Morgan Stern36Dustwallow Marsh
Fallenroot Shadowstalker23–24Blackfathom Deeps
Fallenroot Hellcaller24–25Blackfathom Deeps
Blackfathom Tide Priestess20–21Ashenvale
Blackfathom Oracle21–22Darkshore
Blackfathom Sea Witch23–24Blackfathom Deeps
Blackfathom Myrmidon22–23Blackfathom Deeps
Twilight Acolyte24–25Blackfathom Deeps
Twilight Reaver25–26Blackfathom Deeps
Twilight Aquamancer25–26Blackfathom Deeps
Twilight Loreseeker24–25Blackfathom Deeps
Twilight Shadowmage26–27Blackfathom Deeps
Twilight Elementalist26–27Blackfathom Deeps
Murkshallow Snapclaw22–23Blackfathom Deeps
Blindlight Murloc22–23Blackfathom Deeps
Blindlight Muckdweller25Blackfathom Deeps
Blindlight Oracle25Blackfathom Deeps
Skittering Crustacean22–23Blackfathom Deeps
Snapping Crustacean23–24Blackfathom Deeps
Barbed Crustacean25–26Blackfathom Deeps
Aku'mai Fisher23–24Blackfathom Deeps
Aku'mai Snapjaw26–27Blackfathom Deeps
Deep Pool Threshfin24–25Blackfathom Deeps
Aku'mai28Blackfathom Deeps
Old Serra'kis26Blackfathom Deeps
Lady Sarevess25Blackfathom Deeps
Twilight Lord Kelris27Blackfathom Deeps
Theramore Infiltrator35–36Dustwallow Marsh
Deadmire45Dustwallow Marsh
Earthcaller Halmgar32Razorfen Kraul
Shadowforge Surveyor35–36Badlands
Shadowforge Ruffian36–37Badlands
Shadowforge Digger35–36Badlands
Shadowforge Relic Hunter39–40Uldaman
Shadowforge Darkcaster43–44Uldaman
Shadowforge Archaeologist43–44Uldaman
Stonevault Cave Lurker37–39Uldaman
Stonevault Rockchewer36–37Badlands
Stonevault Oracle37–38Uldaman
Stonevault Geomancer43–44Uldaman

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.