The entire Unforgettable Fire period was extremely bass heavy. Check out songs like 'Wire' and 'Love Comes Tumbling'. The latter song is surprisingly dominated by the fancy finger work of Adam Clayton.
Also 'Please' has some of his most intriguing and progresive work.
theres one adam bassline i adore, unfortunately its only 3-4 seconds long
during "ultra violet", at the end during the last chorus they crank up the volume for the bass for just a couple of seconds...and that gives me chills...