I intentionally chose three with large amounts of time in between. I'd say the older ones are classic and anything too recent can't be considered a classic yet. I'm also not implying that Elysium will become a classic.
My vote is Blade Runner. It's one of my favorites of all time. Then again, so is Ghost in the Shell.
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Something that ruined Blade Runner for me was his cringy voiceover. Like in the final scene. It was emotional, intense, and then you hear Harrison Ford in the most nonchalant, Harrison Ford voice say "I DONT KNOW WHY HE LET ME LIVE." They should've done away with the narration TBH.