There are more female leads in operatic metal than males.
Nightwish
http://www.youtube.com/watch?v=nIsbXJ81SK0&t=192s
Floor Jansen – lead vocals (2013–present; touring member: 2012–2013)
Tarja Turunen – lead vocals (1996–2005)
Within Temptation
http://www.youtube.com/watch?v=KuMB2pTsZP0
Sharon den Adel – lead vocals (1996–present)
Epica
http://www.youtube.com/watch?v=dNoTvg0t52c
Simone Simons – lead vocals (2002–present)
Helena Iren Michaelsen – lead vocals (2002)
Xandria
http://www.youtube.com/watch?v=gGTAmmTiD_Y
Nicole Tobien – vocals (1997)
Kerstin Bischof – vocals (2009–2010)
Manuela Kraller – vocals (2010–2013)
Dianne van Giersbergen - vocals (2013–2017)
Sirenia
http://www.youtube.com/watch?v=dGCxgJFjnZw
Emmanuelle Zoldan – female vocals (2016–present), choir on studio (2003–present)
Henriette Bordvik – female vocals (2003–2005)
Monika Pedersen – female vocals (2006–2007)
Ailyn – female vocals (2008–2016)
Blackbriar
http://www.youtube.com/watch?v=kuvST3wGCG8
ZoraCock
Metalwings
http://www.youtube.com/watch?v=tKpvzjzCQXg
Stela Atanasova – Lead vocals, Electric Viola, Keyboards, Piano (2010–present)