There are other tribes/subspecies of trolls that are not listed here. The reason: they were not mentioned in Troll Compendium on World of Warcraft website. If enough information comes up in the future warrants their listing feel free to add them yourself. Here is a partial list of these types:
Dark trolls are included although Troll Compendium argues they may not actually be a separate type of troll, but rather an offshoot of one of others.