In Christendom, can a person still be considered "Christian" if he or she does not believe in Creation by One God?

Considering the whole umbrella of Christendom including Eastern Orthodox, Syrian Orthodox, Roman Catholic, Coptic Orthodox, Russian Orthodox, Protestant, Pentecostal, Abyssinian, has there been any acceptance of people as true "Christian" who refuse to believe in Creation by a God? Can a person, in any of these streams of Christianity, deny the part of the Creeds mentioning Creation, and still be considered legitimate members of the Christian Church? Still be called Christian? Is ***Creation of the universe by a God*** considered an *essential belief*, or a non-essential? This question totally ignores "how" a Creation was carried out; it sets aside the discussion of the "manner or method" of said Creation! Or is this a ***universal prerequisite"*** (along with perhaps other beliefs or doctrines)? ***Verses to consider to help in answering this***: >Thus saith God the LORD, He who created the heavens and stretched them out; He who spread forth the earth, and that which comes out of it; He who gives breath unto the people upon it, and spirit to them who walk therein. (Isaiah 42:5) >Giving thanks to the Father...Who has delivered us from the power of darkness, and has translated us into the Kingdom of His dear Son...For by Him were all things created that are in heaven and that are on earth, visible and invisible...all things were created by Him, and for Him. (Colossians 1:12-16)