I know these aren’t movies, but I don’t watch a lot of anime movies. I prefer series. Apologies, test subject.
Hellsing/Ultimate
Corpse Party: Tortured Souls
Blood-C
Genocyber
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Higurashi: When They Cry *It's a long series
(Mind you, to get the full story, you have to watch them in this order:
When They Cry (2006)
When They Cry: Kai (2007)
When They Cry: Rei (2009) Specifically the "Saikoroshi-hen" arc (Episodes 2–4).
Higurashi: When They Cry – Gou (2020)
Higurashi: When They Cry – Sotsu (2021)
Nekogoroshi-hen (2007 OVA)
Higurashi: Kira (2011 OVAs)
Higurashi: Outbreak (2013 Movie)
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Shigurui: Death Frenzy
Berserk (1997) *Not that awful POS 2016 Netflix atrocity.
Tokyo Ghoul
Deadman Wonderland
Highschool of the Dead
Ninja Scroll (1990's)
To name a few