Since I finally got my missing GWF years caught up over the past year and have a history 2087-2131, I looked back at my records to see who has been a GRAND SLAM CHAMPION in my GWF (Galactic, Inter-Planetary, United Stars, Galactic Tag).
Pulsar Death Masque Wolf Alpha Force Vyper Encubus Swarm
Star Warrior and Thantos both had runs as Inter-Planetary Tag Champs when I used those belts, but neither ever had the top tag prize so they miss the cut. Havoc and Tricks are still active and are both only missing the US title.
So I bring it up and 11 days later Havoc wins the United Stars Title from Nosfera to become the 8th Grand Slam Champion in my GWF!