No.
First of all, that's the default admin account for Xenforo, which we didn't switch to before 2021. They have a join date of Feb 16, 2021, if you pay attention. The 2nd account ID is of an earlier default admin account from 2009. Your first normal account on the post-crash MB is Account ID 3, Smidge204, followed shortly by SSNTails.
SECOND of all, even before the Xenforo switch, we weren't in the first MB revision.
I'm already gone as far back as possible, to before the MB's crash in 2003, and found the first non-default admin account to be SSNTails.
Therefore, as FAR as can be known, he is first.