Whilst Satoshi is the richest, it's hard to argue that he/she/it is the most powerful because as long as Satoshi is operating out of complete anonymity, Satoshi has only a very limited influence beyond market manipulation.

If Satoshi wanted to make wide-ranging regulatory changes to BTC, someone would have to prove they are Satoshi which will never happen.

PS: So glad you didn't include John McAfee on this list!