According to Scripture, our only mediator and advocate with the Father, it's Jesus. Scripture does not mention others, he does not name them, indeed, he condemns as idolaters those who turn to others other than God.
From the Helvetic Confession of Faith
Adoration, worship and invocation of God through a single mediator Jesus Christ
We teach that we must worship and serve only one true God and we do not attribute this honor to any creature, according to the commandment of the Lord:
“Adore the Lord your God and to Him alone you render the cult” (Mt. 4:10).
No doubt, all the prophets have always blamed the people of Israel whenever they let themselves go to the adoration and worship of foreign gods and did not worship and serve only the one who is the only true God.
As He wants
The rest, we teach that one must serve and worship only one God, as he teaches us to want to be worshiped and served, that is in spirit e truth, without any superstition, but with sincerity of heart [purity] according to his Word:
But the hour comes, indeed it has already come, that true worshipers will worship the Father in spirit and in truth; for the Father seeks such worshipers. God is Spirit; and those who adore it, they must adore him in spirit. Teacher. 4:23-24.
so that one day he may not tell us: “Who asked you these things?"And the apostle Paul also says that one cannot serve and honor God with human hands, as if he needed something, etc. (At 17:25). Now we invoke him in all the decisions and actions of our life and this through the intercession of our only mediator and intercessor Jesus Christ. It is in fact expressly ordered to us:
“Call on me on the day of misfortune; I will save you, and you will glorify me ". (Sl. 50:15).
And we also have the magnificent promise of the Lord that he says: “All that you will ask of my Father, he will grant it to you " (Teacher. 16:23).
Equally:
"Come to me all of you who are fatigued and oppressed and I will console you" (Mt. 11,28).
And being written:
“How they will call on him in whom they have not believed?” (Ro. 10:14)
since this is how we believe in one God, no doubt, we invoke him alone and solely through Jesus Christ.
Only one mediator
There is not, indeed, than a God (as the apostle says) and a mediator between God and men, Jesus Christ (1 Ti. 2:5). Equally: “If we have sinned, we have an advocate with the Father, Jesus Christ, the right, etc." (1 Teacher. 2:1).
I santi
For this we we do not adore born we serve born we invoke i santi who are in heaven and we do not recognize them at all as our intercessors or mediators in heaven with the heavenly Father. In fact, God and the only mediator Jesus Christ is enough for us, so we do not attribute to others the honor that is due solely to God alone and to his Son, all the more that he has expressly said:
"I will not give my glory to another" (Is. 42:8).
Also s. Peter states that no name has been given to men by which one can be saved other than the name of Christ (At 4:12)
In no other is salvation; for there is no other name under heaven given to men, by which we must be saved ".
and certainly even those who put their faith in him do not seek anything other than him.
And yet we do not despise the saints and we do not have any opinion of them. In fact, we recognize them as living members of Jesus Christ, friends of God and like those who have gloriously conquered the flesh and the world. We therefore love them as brothers and we honor them not through some divine worship, but with the honorable esteem we have for them and we also attribute to them the praise they are worthy of; finally, we imitate them. In fact, we ardently desire to imitate their faith and their virtues and share with them in eternal salvation and eternally dwell with them with God., In short, rejoice and rejoice with them in Christ.
Worship of the dead?
We therefore approve of this phrase of Saint Augustine in his treatise on true religion that he says:
“The cult of the dead should not be religion for us. We must not in fact assume that they, if they lived in the fear and love of God, they desire such a cult from us; rather they require of us that he be worshiped and served by whose enlightenment they rejoice that we are made with them servants of his merit. We must therefore honor the saints through their imitation and not worship them by religion, etc."
Worship of relics?
Consequently, we believe even less that the relics of the saints should be adored or honored. Even the ancient saints, when they lived in this world, they felt they had sufficiently honored their dead saints, to have their bodies duly buried, after God had withdrawn their souls from this world, and they believed that the noblest relics they could have esteemed were the virtues, the doctrine and faith of their predecessors and were precisely these virtues, doctrine and faith that they not only recommended through the praise of the dead, but they also endeavored to express and re-present during their life on earth. These ancients never swore except by the name of God alone, l'Eterno, as it is ordained by the law of God. As per it we are forbidden to swear by the names of foreign gods (Of. 10,20; Is. 23,13), so we do not swear by the names of the saints. In conclusion, therefore we reject in all these things any doctrine that attributes more to the deceased saints than is appropriate for them.