I did a lot of catch up, but I'd like some recommendations if someone as the time.
Going through a few of your lists:
Don't Look Now, Get Carter, The Day of the Jackal, Walkabout, The Man Who Fell To Earth, Dawn Of The Dead, Invasion of the Body Snatchers (but watch the original, too, as it's better IMO), The Andromeda Strain, Black Christmas, The Texas Chainsaw Massacre (I hate it, but it's a horror touchstone), Suspiria, Deep Red, Don't Look Now, Five Easy Pieces, The Marriage of Maria Braun (Doesn't do much for me, but mark loves it), Picnic At Hanging Rock,
Now some HK choices. I don't know if you've seen them or not, but have at it.
Alice, Sweet Alice, Enter The Dragon, The Warriors, Death Race 2000, The Taking Of Pelham One, Two, Three, Rollerball, Coffy, Logan's Run, The Vanishing.