Ordered Chaos is pretty explicit in saying "spells and effects," and since soulmelds are definitely effects it would work.
The Hellbred's Evil Exception ability is as follows:
Evil Exception (Ex): Regardless of alignment or class restrictions, a hellbred can cast spells with the evil descriptor and never gains negative levels while wielding evil magic items, such as unholy weapons or demon armor...
It explicitly says spells and nothing else. Nothing in the soulmeld-magic transparency page says that soulmelds qualify as spells for all intents and purposes; merely that for some things they behaved similarly. Ability to use them is not one of those things.
And Arz, Sanctified creatures are listed as Always Good, t least in the BoED. Are you using a different source? Is there even a different source for that? Anyway, by the BoED's Sanctified Creature rules, that Neraph couldn't be LE.
However, a creature that had the
Evil subtype but was actually Lawful Good and had the Ordered Chaos feat could indeed qualify as all four alignments because of the wording:
"Any effect that depends on alignment affects a creature with this subtype as if the creature has an evil alignment, no matter what its alignment actually is. The creature also suffers effects according to its actual alignment."
Bold for emphasis.
The only creature I know of with the Evil subtype that isn't listed as Always Evil is the Kaorti from Fiend Folio. So a LG one of those with OC could do it, as could any other LG Evil subtype Sanctified creature with OC.
