No-one and nothing is comparable to the triune God in his nature or comparable to him in his character and activity.
There is no God except the LORD
See also
God alone stands outside nature as its Creator. All other beings are created by him.
There is no-one like God
In his creative power
In his mighty acts
In his character and glory
In his ability to save
In his covenant love
pp 1Ch 17:20-21
In his sovereignty
Implications of God's uniqueness
God alone is to be worshipped
pp Dt 5:6-7
Idolatry is empty and worthless