Wich is the best anime movie for you. For me it's Your Name. ; Wolf Children; The Wind Rises and Totoro !
Spirited Away, the only anime movie which won the Academy Award
Garden of the worlds.
A silent voice
The disappearance of haruhi suzumiya
Ah I forgot about the disappearance of haruhi suzumiya that was also a good one
Keroro Gunsō, super movie 3: Keroro vs Keroro, The Great Sky Duel, de arimasu!
Demon slayer is probably going to be my favorite when it comes out
For standalone Movies it's probably Fireworks, the Journey to Agartha and Mononoke Hime followed by Mary and the witches Flower for me.
As for movies that are a series or part of a series
Kara no Kyoukai, the garden of Sinners.
Madoka Magica Rebellion
FSN Heavens Feel
Heavens Feel was epic
Dragon Ball super Broly
Naruto the last
What do you think?