Hi:
I think Mike Oldfield's 'Amarok' wins both for quantity and quality of weirdness. These are all the instruments he used. Notice the bold ones (that includes objects, instruments I really don't know about and just wierd things):
Voice
Tin Whistle
Guitar, Acoustic & Electric Bass, Bouzouki, Mandolin, Ukulele, Banjo, Grand Piano, Organ, Shoes, Hoover, Glockenspiel, Marimba, Bodhrán, Northumbrian Pipes, Clay Drums, Triangle, Tambourine, Wonga Box, Bell Tree, Sticks, Finger Cymbals, Toy Dog, Melodica, Chairs, Psaltery, Spinet, Jew's Harp, Penny Whistle, Punch Ball and Club, Spoons, Referee's Whistle, Fingernails, Pan Pipes, Glass Of Water, Guitar Tuner, Violin, Door, Face Slap, Toothbrush And Teeth, Fake Radio, Contents Of Aeromodeller's Toolbox, Glass, Hammer And Bucket, Fake Firework, Rototom, Cabasa, Bongos, Orchestral Bass Drum, Timpani, Kalimba, Synthesiser, Tubular Bells...
Impressive. And a trully remarkable record for a) being wierd and, at the same time, more or less accesible and b) havien been made at the end of the 80s by a rather popular artist at the time.