Probably Adam Back for several reasons. He invented Hashcash which is used in the bitcoin mining process. He writes in the same way as Satoshi. Back was the second person Satoshi reached out to with the earliest draft of the Bitcoin whitepaper, still he acted like a noob on the forums to throw people of. Adam Back was a pioneer in the field of cryptography, and his contributions to the Cypherpunk movement were very important. He was an active participant in the group's debates, and his Hashcash function inspired the development of other algorithms and programmes by his fellow Cypherpunks, such as Hal Finney's RPoW and Bitcoin. Not only does Back have a Ph.D. in computer science and a history of studying cryptography in academia, but he has also built his whole career on ideas that are central to Bitcoin.  He is the CEO of Blockstream, which he co-founded in 2014 and I feel it´s his way to get back into control of bitcoin.