Ye are made full (este peplērōmenoi). Periphrastic perfect passive indicative of plēroō, but only one predicate, not two. Christ is our fulness of which we all partake (Joh 1:16; Eph 1:23) and our goal is to be made full of God in Christ (Eph 3:19). “In Christ they find the satisfaction of every spiritual want” (Peake).
The head (hē kaphalē). There is no other place for Christ. He is first (Col 1:18) in time and in rank. All rule and authority comes after Christ whether angels, aeons, kings, what not.