Forget the sentimental cute stuff for one moment, Ghibli has a fair share of horrific monsters and action which is what I love about it
(I made a post recently about that)
It's like I like imagining all the Ghibli monsters together like some Jurassic Park sort of take and the idea of them all fighting each other would be so cool like some Ghibli version of Mortal Kombat or something.
-The giant ohmu in Nausicaa and other insects
-The giant evangelion-like warriors also from Nausicaa
-No-face from spirited Away vs the demon boar from PM I once pitched like both are black oozy monsters that would make formidible opponents to each other who would win?
-The giant animal gods from PM Moro vs Okkoto and Nago like that would be pure mammalian Jurassic Park