Welcome, glad you found your way here
Recently there have been a number of old-school anime that have gotten remakes/updates. Some of my personal favorites include Dororo, Fruits Basket, Ushio & Tora and Star Blazers 2199/2202. Pretty sure SSS Gridman had it’s basis in an older series. think I saw where Orphen is in the works. I haven’t watched much of Sailor Moon Crystal (my understanding is that it starts out disappointing but gets better and so far has adapted up to the Sailor Moon S part of the series i.e. Sailor Saturn). We also finally got an official English release of the original Sailor Stars season i.e. the Sailor Starlights.
You mentioned several of Satoshi Kon’s works which tend to have complex, strange, psychological stories so maybe try Beautiful Bones, Boogiepop & Others (includes a retelling of the original series), Durarara & Baccano.
Finally, since you also mention Gurren Lagann maybe try Darling in the Franxx.
I could go on & on, but I’ve rambled enough (hope I didn’t tire you out). Anyway, hope you like it enough here to stay & participate