This song is hardly "bombastic opera-metal-rock". Anette is good, just not bombastic good.
Plus you can't really have opera-metal with 4 minutes song.
Nightwish is one of my favourite bands, but I stopped at their last album (Century Child) with Tarja, which was their best up until then.
If I had to pick a song that matches your description it would be:
Beauty Of The Beast
<![CDATA[<span data-s9e-mediaembed="youtube" style="display:inline-block;width:100%;max-width:640px"><span style="display:block;overflow:hidden;position:relative;padding-bottom:56.25%"><iframe allowfullscreen="" loading="lazy" scrolling="no" style="background:url(https://i.ytimg.com/vi/GguVsNE1aEg/hqdefault.jpg) 50% 50% / cover;border:0;height:100%;left:0;position:absolute;width:100%" src="https://www.youtube.com/embed/GguVsNE1aEg"></iframe></span></span><br /><a href="http://www.youtube.com/v/GguVsNE1aEg" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">http://www.youtube.com/v/GguVsNE1aEg</a>]]>10. Beauty Of The Beast
[Long Lost Love]
Trees have dropped their leaves,
Clouds their waters
All this burden is killing me
Distance is covering your way,
Tears your memory
All this beauty is killing me
Oh, do you care,
I still feel for you
So aware,
What should be lost is there
I fear I will never find anyone
I know my greatest pain is yet to come
Will we find each other in the dark
My long lost love
[One More Night To Live]
Safely away from the world
In a dream, timeless domain
A child, dreamy eyed,
Mother's mirror, father's pride
I wish I could come back to you
Once again feel the rain
Falling inside me
Cleaning all that I've become
My home is far but the rest it lies so close
With my long lost love under the black rose
You told I had the eyes of a wolf
Search them and find the beauty of the beast
All of my songs can only be composed of the greatest of pains
Every single verse can only be born of the greatest of wishes
I wish I had one more night to live
A saint blessed me, drank me deeply
Spitting out the misery in me
Still a sinner rapes 1000 saints
Sharing the the same hell with me
Sanest choice in the insane world...
Beware the beast but enjoy the feast he offers
[Christabel]
"Oh, sweet Christabel. Share with me your poem.
For I know now, I'm a puppet on this silent stage show.
I'm but a poet who failed his best play.
A Dead Boy, who failed to write an ending
To each of his poems."
