I since there are many villains on this wiki that play the role as the tertiary antagonist within a Cartoon, Movie, Game, Anime, or Live action TV show that don't fit in the category as recurring villain or minor antagonist since they had an important role within the story.
Some examples of villains the play the role as the third biggest threat to the hero or the world the story is based in.
Georgie Porgie (The Wolf Among Us)
Dreyfus (Dawn of the Planet of the Apes)
Ryder (GTA)
Max (TDPI)
Thomas DeVito (Goodfellas)
Hiroshi Sato (Korra book one)
Troy (The Walking dead game season two)
Daina Le Guin ( Dead Space 2)
Envy (FMA brotherhood)
Red (Dead Rising 3)
Making this page is worthwhile since they do not fit in as Big bad, secondary antagonist, or minor antagonist.