13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Falstad Wildhammer50High ThaneThe Hinterlands
Gryphon Master Talonaxe44The Hinterlands
Roetten Stonehammer40Reclaimers Inc.Ironforge
Kreldig Ungor35Reclaimers Inc.Desolace
Craven Drok35Orgrimmar
Keldran38Orgrimmar
Takata Steelblade40Desolace
Vahlarriel Demonslayer37Desolace
Tyranis Malem36Desolace
Dalinda Malem35Desolace
Sandfury Hideskinner42–43Tanaris
Sandfury Axe Thrower43–44Tanaris
Sandfury Firecaller43–44Tanaris
Sandfury Shadowcaster43–44Zul'Farrak
Sandfury Blood Drinker44–45Zul'Farrak
Sandfury Witch Doctor44–45Zul'Farrak
Patrick Garrett15Undercity
Practice Dummy1Undercity
Tyler20Undercity
Edward20Undercity
Robert Gossom20Undercity
Richard Van Brunt20Undercity
Marla Fowler20Undercity
Chloe Curthas20Undercity
Andrew Hartwell20Undercity
Riley Walker20Undercity
Brother Malach20Undercity
Sergeant Houser40SergeantUndercity
Travist Bosk20Undercity
Eldin Partridge20Undercity
Alyssa Blaye20Undercity
Venya Marthand10Tirisfal Glades
Mattie Alred20Undercity
Helena Atwood20Undercity
Edrick Killian20Undercity
Practice Target1Undercity
Carendin Halgar50Undercity
Lysta Bancroft30Undercity
Male Human Captive5Undercity
Female Human Captive7Undercity

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.