Here're two of my fav not-so-well-known metal bands w/ some symphonic elements.
More folk than symphonic, but in the same realm and female fronted.
A couple tracks from my fav symphonic black metal band (not counting Summoning if you consider them such.)
https://fjoergyn.bandcamp.com/track/leiermann
https://fjoergyn.bandcamp.com/track/freiheit