An article that makes no points about Chaos even being sentient at that. Good going.
Yes, Chaos is the personification of primordial reality, that does not preclude that he has sentience.
I'm no LOTR buff, but I believe he sang the Universe into being. Which proves that he can 1) Do things and 2) Can actually think, which Chaos cannot do.And what are Eru's best feats if I may ask?