The Sandman
I always viewed The Sandman was more of a dangerously misguided individual with good intentions than a villain . Pathological altruism. His main goal was only to insure peace on Earth by making everyone sleep forever.
Of course his goal was extremely shortsighted, as various dangerous entities would have still surfaced like Vigo, and no one would be there to stop him.
Another thing, Egon spoke about Sandmen with such certainty as if at least one person had previously encountered one or more and recorded it in the past. This could imply maybe even Tobin himself, but that's merely conjecture on my part.The Sandman himself confirmed that there were many entities such as him. Judging from the fact that no other Sandmen appeared to rescue him in the subsequent years could imply the others viewed him as a renegade and disavowed him.