Lucky Star and K-on for CGDCT
Evangelion for meta-commentary and deconstruction, to the point that future works that qualify often get called the “Evangelion of <genre>”
Fullmetal Alchemist Brotherhood and Attack on Titan for battle shounen
Bocchi the Rock for girls band anime, specifically
Lupin III: The Castle of Cagliostro for pretty much all of Ghibli
Akira for 90s anime
Yeah, it’s good, but there are plenty of older ones: K-On!, Sound! Euphonium, Show By Rock!!, BanG Dream!, arguably Carole & Tuesday… (also quite a lot of others that came out around the same time; the genre seems to be in vogue this decade or so).
It’s an interesting and original take on the giant mecha genre, I’ll give it that, but I can’t think of anything that’s specifically riding on its coattails, no.