There's been a few other admins which were not "head" admins such as:  Raoul Duke who was last active in 2019. My memory fails when they were no longer a staff member, but I believe there does exist a thread when they were made an admin.

I said there was a few, but that might not be the case as my memory is coming up blank right now. I could have sworn there was a thread which documented all staff member changes throughout the years though.