None of these, I'd easily prefer Cowboy Bebop or Tengen Toppa Gurren Lagann or Neon Genesis Evangelion.
No one for Gunbuster or Die buster TT_TT I suppose Bokusatsu Tenshi Dokuro-chan (Bludgeoning Angel Dokuro-chan) counts, it was only like 12 episodes, each only like 15 minutes.
The best short anime's I find is: Death Note ( 26 eps and 2 movies). Witchblade (26 eps) Devil Lady (26 eps)