I think his greatest creation was the playwright of Romeo and Juliet.
Mickey Mouse is the greatest creation of Walt Disney, and the most known.
It's difficult to answer this, but i guess it's because all the previous things were created in order to enable the creation of man. For example the light (i guess it's metaphorical for the universe) or animals to provide food. Also you can notice that man is the greatest of the creation so his importance is emphasized by that he was created on the sixth day, the day before God rested.
humans
Christ Jesus is the highest creation of God.
God did not curse His creation but the actions which his creation (Man) committed. Man is perfect in his bodily creation but imperfect in the use of the intelligence it possesses.
Jesus Christ preexisted the creation. Man is part of the creation.
Adam was the first man in the Muslim creation story.
the creation of factions
The Bible does not mention angels having ANY role in the creation of man. The Lord created man Himself.
The creation of the "Firebird Suite".
I think it was The Creation of Man From Clay