In my opinion, some of the best evidence is the old photos taken from negatives. The reason for this is because you have the actually negative to compare and examine with the actual photo. These I think are better examples or proof is because they were taken before the age of computers, photo shop, and CGI.
There are several fantastic modern day photos and video that has captured some very interesting paranormal evidence in the present day, but as I mentioned earlier the nonbeliever will always be skeptical and there will always be a chance of tampering.
**Photo is of the Brown Lady of Raynham Hall taken in 1936**