As we say in another language, "you should probably get your ears cleaned".
Besides the Blade Runner & Chariots of Fire soundtracks (two masterpieces of albums, which is two more than 90% of the world), his repertoire is filled with instant electronic classics, such as Earth, Albedo 0.39, Spiral, and l'Apocalypse des Animaux.
I'm not even mentioning Aphrodite's Child.
For me first experience of Aphrodite's Child was even better for I knew of Demis Roussos only by his later work