Oh, I wouldn't say that. It all depends on their motivation. Take the Elder Evils, for example.
LE: Atropus, Pandorym, Zargon
NE: Ragnorra
CE: Father Llymic, the Hulks of Zoretha, the Worm that Walks
CN: The Leviathan
Plenty of spread across the Evil alignments (including one effectily...