Total number proven beyond a reasonable doubt to exist: 0.
Total number proven beyond a reasonable doubt not to exist: also 0.
Actually, a lot have been proven to not exist. The Greek gods which were worshiped clearly don't exist as there is no evidence on top of Mount Olympus. The Roman gods were disproven. Even the sun god Ra has been disproven as the sun has been proven to be a star and not a god.