The Most Underrated Anime of the Last Decade

Some anime have great word-of-mouth but low popularity, which is a real shame. I want to recommend these hidden gems with everyone:<br><br>My recommendations:<br>- <i>Made in Abyss</i> — Cute art style but super dark plot<br>- <i>Odd Taxi</i> — Incredible narrative structure<br>- <i>Vivy: Fluorite Eye's Song</i> — A masterpiece on the theme of AI<br>- <i>86 -Eighty Six-</i> — A moving story within the war genre<br><br>What other underrated works do you all have?