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Notre Dame de Paris Lune - the emotions slightly interfere with the melancholy. Overall, it fits, but 6/10.
Zero no Kiseki Evolution OST - Feelings Crushed... - I understand that the title is "Feelings Crushed," but this music could be used for a scene where the hero is riding across a field, contemplatively observing the beautiful landscape around him.
I listened to it a couple of times, and I liked it more the second time. I confirm that it fits the theme, 7/10.
But recently, there was a track from Ao no Kiseki OST, and another from Kuro no Kiseki OST (both of which I have saved) - is this from the same theme, or are the coincidences random?
Ayunga (阿云嘎) - 【Nie Mingjue & Nie Huai Sang】 Qinghe Jue (清河诀) Official OST Ver. Fatal Journey - this is not background music, but rather a full-fledged, emotional piece. I lowered the score by 1 point due to the dialogues in the video. 5/10.
Judas Priest - Beginning of the End (Audio) - this fits, although I don't like it very much, 7/10.
Lana Del Rey - Ultraviolence - I barely made it to the end. I'm not a fan of the artist; it seems like all her songs are the same.
No, I wouldn't be able to indulge in melancholic thoughts while listening to this; it would make me want to turn it off. 3/10.
Masha Badda Boo - Luna - no, the lyrics are too interesting for melancholy. You simply listen to the song with interest, instead of reflecting on yourself. - 5/10.
The Only Thing I Know For Real Piano Version (No Vocals) - 10/10.
Sewerslvt - Mr. Kill Myself - meh. It's not at all what I was looking for. 1/10.
Tamino - Indigo Night - I don't remember anything about it, 3/10.
Type O Negative Angel - I respect it. 7/10.
Canon in D (Pachelbel) - Viola & Piano - it doesn't evoke melancholy, although the melody is good. 3/10.
Enya - Echoes In Rain (Official Lyric Video) - yes, this is exactly what I need. 9/10