I agree with most of this, but the idea of a classic big three is something that only exists in your head. I'd argue Legend of the Galactic Heroes is better than any of those three, and it aired at about the same time.
Mirai and Belle were both pretty mediocre imo.
Perfect Blue wasn't bad or anything, but it needs a "this movie is generally fucked up" content warning.
Tokyo Godfathers is probably the best Christmas movie in anime.
Summer Wars has kind of a nonsense plot but it's such an accurate depiction of a family reunion that watching it makes me feel nostalgic anyways.