TheWoWDBHas a seemingly unique voiceset, namley that of a female tuskarr.
Definitely odd.
Humanoid
Kengtus Pranch the Patient
Horde Vanguard
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
As of patch 6.2.2 she still does. Very.... odd. As far as I know there are no female Tuskarr, or at least female Tuskarr models. Another Dark Portal Vanguard that has the wrong voice set is Alya.
Details
This roster comes from the current game client's data files, so it is not a complete list of every NPC in the game - older world NPCs that are no longer in the modern client are absent.
Community notes from Wowhead · 3 comments
Top 2 shown above · 1 more hereThe comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
While odd, I think it was just an excuse to use this soundset.
Level and Map Tracking
The game data tunes Kengtus Pranch the Patient for levels 10 to 40, Warlords of Draenor content.