• Eastern Moths (progressive oriental metal) (I know, but that's the genre name! Ugh.)

• Eleine (symphonic goth metal)

• Enya (Celtic new age ambient)

• Epica (symphonic metal)

• Erragal (pagan metal)

• Exulansis (folk metal)

• Frozen Crown (power metal, melodic death metal)

• Garbage (alternative, grunge)

• Girlschool (classic metal) (also the longest-running all-female group in metal)

• Halestorm (hard rock, alternative metal)

• Heilung (experimental folk/folk metal/ritual ambient)

• Hildr Valkyrie (blackened folk metal)

• Holyarrow (symphonic metal, gothic metal, black metal)

• Ieschure (occult black metal) (single-woman project, she plays all instruments and does all vocals)

• Imee Ooi (Buddhist ambient)

• In This Moment (alternative metal, metalcore, hard rock)

• Infected Rain (nu-metal, alternative metal)

• Isabelle Huang (pop with strong folk elements) (also a goddess)

And that's up to I. 17 more letters of the alphabet to go!