Satoshi isn't the first to come up with a digital form of money. There's been ecash, hashcash, and even PayPal before Bitcoin. The closest logical peer to Satoshi is probably Linus Torvalds, the founder of Linux. Since Satoshi is simply building a better system on top of Hashcash, this makes the most logical sense, since Linus Torvalds simply created a better version of Unix.
Although I agree 100% that Satoshi did not invent digital money he did create a working implementation of the "blockchain" concept which is actually a far more significant thing (whether or not he was the originator of the blockchain concept I am not sure as I've read that it might have been proposed before by others known in this area).
Prior to this creation there was no P2P way of achieving "consensus" that could be trusted enough to solve the "double-spending problem".
My guess is that the significance of this creation will only be understood completely many years down the track (but my gut feel is that it is one of the most important creations in the last 50 years).