Sporewood is a great mushroom forest. The name comes from the famous one located in Dagori Inkarth, or Shadows Dance, in the Rockwood Mountains of Glorantha. For my purposes, however, it can exist elsewhere as well - fungus caverns are also a popular choice.
Sporewood is the home of the Voralon, the "dark elves" of Glorantha. Mushroom men, you could call them.
Hasslefree Miniatures call them Agarix. They can be found here: A, and here: B.
Khurasan Miniatures call them Fungoids. I don't have any of the latter yet, having only just stumbled on them, but at 12-25mm height I think they will fit in well.
I think Agarix/Voralan should be quite varied in appearance, expecially given there are so many varieties of mushrooms out there!
This just in...
Andrew posted in the comments:
"You may find [Ral Partha Europe]
of use but I am not sure if these would go [Reaper]:
I do like these though no idea of size! [Magnetic Displays]
Thanks! These are great - I do think the Reaper would go as variety is important for Agarix.