13,394 NPCs

Classic reference; current Forever availability is unconfirmed.

NPCLevelTitleZone
Brave Darksky12Mulgore
Brave Rockhorn12Mulgore
Brave Wildrunner14Mulgore
Brave Rainchaser12Mulgore
Brave Cloudmane14Mulgore
Corrupted Mottled Boar10–11Durotar
Corrupted Scorpid10–11Durotar
Corrupted Bloodtalon Scythemaw10–11Durotar
Corrupted Surf Crawler10–11Durotar
"Squealer" Thornmantle5Mulgore
Nazgrel62Advisor to ThrallOrgrimmar
Corrupted Dreadmaw Crocolisk11–12Durotar
Bristleback Interloper9–10Mulgore
Lorekeeper Raintotem8Mulgore
Lost Barrens Kodo14–15The Barrens
Greater Barrens Kodo24–25The Barrens
Barrens Kodo19–20The Barrens
Wooly Kodo25–26The Barrens
Stormhide22–23The Barrens
Thunderhead20–21The Barrens
Stormsnout18–19The Barrens
Savannah Patriarch15–16The Barrens
Zhevra Runner13–14The Barrens
Savannah Highmane12–13The Barrens
Greater Plainstrider11–12The Barrens
Ornery Plainstrider16–17The Barrens
Fleeting Plainstrider12–13The Barrens
Thunderhawk Hatchling18–20The Barrens
Barrens Giraffe15–16The Barrens
Greater Thunderhawk23–24The Barrens
Silithid Creeper20–21The Barrens
Silithid Grub20The Barrens
Silithid Swarmer21–22The Barrens
Silithid Harvester24The Barrens
Sunscale Lashtail11–13The Barrens
Sunscale Screecher13–15The Barrens
Sunscale Scytheclaw16–18The Barrens
Ishamuhale19The Barrens
Bristleback Hunter17–18The Barrens
Bristleback Defender20–21

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.