Now there are a few names I could list, going from different times in my life.
When I first got into the community? Blazer
Before I played the jp games and didn't really know a thing? Marc
Getting into modern times, as those two were the only two I immediately thought of for years, I've met a good number of Rom Hackers, and today, being associated with some of them, I want to say that the first name I think of is either Kirb or Circles. Kirb, for all the jokes he makes as far as Rom Hacking, knows a lot about the Sacred Stones rom, as well as Thracia 776 and the NES roms. Circles is probably the most talked about, for his work on the Skills system, which is sadly all I hear when his name is mentioned.