Finney was the 'last' Satoshi.

Final post was "I am not Dorian Nakamoto", on the P2P Foundation, early 2014. A typical gentlemanly act from Finney, who died later that year. He had custody of the Satoshi identity after the original owner 'moved on to other things'.

That original owner is also dead and there's a tribute engraved early in the bitcoin blockchain.