I'll second Peter Gabriel's Passion (Last Temptation of Christ), Long Walk Home (Rabbit Proof Fence) and Birdy. All great. Especially the first 2.
Also -
Apollo, Music For Films (Brian Eno)
Dune (Klaus Schulze)
Traffic - (various) (includes a tune from Eno's Apollo)
Twin Peaks (Badlamenti)
Legend, Sorcerer (Tangerine Dream)
Bladerunner (Vangelis)
Insomnia (David Julyan)
Memento (various)
Pi (various)
Braveheart (Horner)
Also -
Apollo, Music For Films (Brian Eno)
Dune (Klaus Schulze)
Traffic - (various) (includes a tune from Eno's Apollo)
Twin Peaks (Badlamenti)
Legend, Sorcerer (Tangerine Dream)
Bladerunner (Vangelis)
Insomnia (David Julyan)
Memento (various)
Pi (various)
Braveheart (Horner)