I feel Mox has been the best world champ they've had so far. He was constantly, and still is, possibly the most exciting part of any show he was on. His feuds with Brodie, Eddie, MJF and Kenny were all money imo. I came into Kenny's reign super high on him as well, and I think Kenny is still doing great in both the character and ring work departments but I also feel like being the belt collector has spread him a little thin and prevented him from having a particular focus within AEW that would elevate the reign further.