Aaron
The priests did not consecrate themselves, all was done by another, in this instance Moses, acting for Jehovah. The priests simply presented their bodies in the sense of (Romans 12:1).
Related Commentaries of Leviticus 8:2
Leviticus 8:2
2 Take Aaron and his sons with him, and the garments, and the anointing oil, and a bullock for the sin offering, and two rams, and a basket of unleavened bread;