Never took off with controlling, and don't fly online much at all. But I lurk here, and occasionally respond. Just from the forums, I learned a lot about FH. He was a man who loved aviation. He learned how to control, found a smaller basically unused airport, and turned it into a place where one knew they would be welcome to fly, be it a full IFR approach or simply three bounces to "stay current." He knew that every pilot, real world or simulated needed the basic VFR flying skills, and successfully brought it to VATSIM.
I agree with the suggestion of retiring his initials. His contributions to ZLA are deserving of that. I would go one step further, leaving him on the roster, perhaps with full privilages.