Rat
The intrepid archaeologist Harrison Jones has a well documented fear of rats.
This NPC can be found in
Tirisfal Glades (65), Terokkar Forest (38), Hillsbrad Foothills (22), Darkshore (16), Loch Modan (15), The Hinterlands (12), Desolace (11), Ashenvale (11), Arathi Highlands (10), Howling Fjord (10), Ghostlands (7), Stonetalon Mountains (6), Deathknell (5), Azshara (4), Bloodmyst Isle (3), Silverpine Forest (3), Azuremyst Isle, Timeless Isle.