Christ, the Mediator

In virtue of His atonement.
Ephesians 2:13-18 But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ. 14 For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us; 15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace; 16 And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby: ...

Hebrews 9:15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.

Hebrews 12:24 And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.
The only One between God and man.
1 Timothy 2:5 For there is one God, and one mediator between God and men, the man Christ Jesus;

Of the gospel covenant.
Hebrews 8:6 But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises.

Hebrews 12:24 And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.
Typified.

Moses,
Deuteronomy 5:5 (I stood between the LORD and you at that time, to shew you the word of the LORD: for ye were afraid by reason of the fire, and went not up into the mount;) saying,

Galatians 3:19 Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.
Aaron,
Numbers 16:48 And he stood between the dead and the living; and the plague was stayed.