I doubt that Jacob is the Biblical Jacob - the show uses LOTS of biblical themes and imagery, but that'd be a little *too* literal, if you ask me.
Do you know what I thought of when I saw the opening sequence of this season finale? The wager between God and Satan at the beginning of the book of Job - except that it's not quite clear who plays which part.
Sure, Jacob seems to be the "good guy" here - but he is also the one who disrupts the Order of the island, tainting paradise by bringing strangers here. He's a trickster figure - just like the devil - rather than a champion of the Powers that Be. He plays by the rules, yet seeks to bend them as much as possible in order to fundamentally change things. (Whereas the anonymous guy in the black shirt is a creature of order and determinism - he seeks a loophole, yes, but only to keep things as they were, not to change them for the better.)
Or think of the very first shot, showing the weaving of the tapestry: I think that's what both Jacob and his adversary have done throughout the millennia - they crafted plans that took long to execute, but eventually turned into the Big Picture that will resolve the conflict - and wrap up all the seasons of the series.
Oh, and the statue? It just *might* be Set, the Egyptian god of storms and darkness.
Why? Because Set killed his brother Osiris, and threw his remains into the Nile. Osiris's wife Isis, however, gathered his remains and brought him back to life, so that he could become the god of the underworld.