That was a pretty good list. I haven't seen Akira though, i'll try and find it online somewhere...
I would suggest Neon Genesis: Evangelion.
It's a short series but the story and the messages that are conveyed are just incredible. The ending was hard to understand but I appreciated it a heck of a lot after I fully got my head around it...
PickleJewz
If you like FLCL, Try Dokuro-Chan. I beleive it's made by the same people.
And i agree with Inu, Higurashi is the shit.