thinking fellers union local # 282 (4)
boredoms (at least 4)
charalambides (one era had 3-4, usually just christina though)
acid mothers temple (depends on the era, but there's been many vocalists on tracks before..)
sun city girls (3)
fire on fire (5)
cerberus shoal (6)
polysics (kaja kaja goo ep era had 3)
koennjihyakkei (I dunno, probably like 5; they're usually harmonizing though)
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