Mouse
It seems that mice are completely incapable of resisting cheese even in the face of imprisonment, injury, or death.
This NPC can be found in
Azuremyst Isle (29), Westfall (22), Mulgore (13), Duskwood (7), Crystalsong Forest (6), Dustwallow Marsh (4), The Exodar (4), Wetlands (3), Camp Narache (2), Silvermoon City (2), The Veiled Sea.