Actually, I believe that atheists would immediately accept God, once they saw the evidence. Their minds are not cluttered with religious baggage, and so acceptance is straightforward.
Unfortunately, the things you mention are not evidence.
The Qur'an has an answer for this:
Surah Al-An'am 6:111
"Even if We sent down angels to them, and the dead spoke to them, and We gathered together everything in front of them right before their eyes, they would still not have iman unless Allah willed. The truth is that most of them are ignorant."
"And even if We had sent down to you, [O Muhammad], a written scripture on a page and they touched it with their hands, the disbelievers would say, "This is not but obvious magic."
"And they say, "Why was there not sent down to him an angel?" But if We had sent down an angel, the matter would have been decided; then they would not be reprieved."
In other words people would disbelieve regardless if they saw metaphysical beings.