EVERY reference you gave can be interpreted to mean that an Atheist who follows all of the Commandments will not make it into Heaven.
Can someone ever be GOOD enough to make it to heaven on his own merits? NO
Can an atheist be saved? H-LL NO!
Are works important in a Christian's life? Absolutely, YES
Are works needed along with faith for someone to go to heaven? NO
Are we commanded to do good works then? YES
What for if they can't help us be saved? Christ said, "If you love me, you will keep my commandments." Good works, a lifestyle of obedience to God, a life that brings honor to God, actions that show we have become a new creation in Christ, actions that don't bring derision to the faith. All these things are because we are born again not in order to become born again.
And how many works are enough if folks need them to get into heaven? Faith is the way in. Works that God planned for us from the beginning are the works that He wants us to do. Living a godly life is the ultimate work...