Well you could have a look at the Bitcoin Core developers. Gavin Andresen would be another relevant figure.
If you're looking for particularly early users, you could have a look at satoshi's post history and the other people that posted - people like Hal Finney, theymos, Gavin Andresen and Sirius were around at the time.
Here is a list of 100 relevant figures.
This is really a complete list of very famous people and a voice in the cryptocurrency market. They are very successful in this market although each one develops in different directions. Very thanks for your sharing on this list. If you're looking for particularly early users, you could have a look at satoshi's post history and the other people that posted - people like Hal Finney, theymos, Gavin Andresen and Sirius were around at the time.
Here is a list of 100 relevant figures.