This is one of the most bizarre threads started by anyone.
But there is at least one example of one person in the New Testament, and many examples in the Old Testament, of people being saved by themselves with only God being present.
LUKE 18
9 And he spake this parable unto certain which trusted in themselves that they were righteous, and despised others:
10 Two men went up into the temple to pray; the one a Pharisee, and the other a publican.
11 The Pharisee stood and prayed thus with himself, God, I thank thee, that I am not as other men are, extortioners, unjust, adulterers, or even as this publican.
12 I fast twice in the week, I give tithes of all that I possess.
13 And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner.
14 I tell you, this man went down to his house justified rather than the other: for every one that exalteth himself shall be abased; and he that humbleth himself shall be exalted.
The publican (tax collector) was all by himself -- "standing afar off". Jesus said that he went home "justified". To be justified means to be declared righteous by God. And to be justified means to be saved by grace through faith.
Abraham was all alone when he too was justified by grace through faith. So the answer to the title of your thread is "ABSOLUTELY".