Propaganda - now that's something I haven't heard for a while! Way ahead of their time, loved P Machinery back in the day. Definitely go with Ulrich Schnauss, Boards of Canada ('the campfire headphase' is more approachable than some of their other stuff), first two Air albums (Premieres Symptomes + Moon safari). Would highly recommend 'Nathan Fake - drowning in a sea of love' and 'Sabres of Paradise - Sabresonic' which is a bit of a classic though it might still be deleted, Also any Lemon Jelly or Orbital, William Orbit (Strange Cargo III) and Aphex twin Selected Ambient Works Vol.1 1985-1992 and although I wouldn't class it as electronic, 'Nightmares on wax' have some great laid back albums.