I wouldn't call the Istari "powered down" Maia. Gandalf did single-handedly defeat a Balrog, after all.
For some cross-cultural comparisons, Gandalf and the Balrog remind me of a pair of large guardian statues which flank the entrances of Buddhist Temples in Japan, most notably the Todai-Ji, located in Nara. Known as the "Nio" ("benevolent kings"), they represent two sides of the attribute of strength.
Agyo (阿形) is a symbol of overt strength and violence, is armed, and is depicted with an open mouth:

I see Balrogs, Melian, or other Maia who manifest their strength overtly as akin to an Agyo
(more in the post below, as I can't fit 4 images in one post)