#4 Jake "The Snake" Roberts

Jake "The Snake" Roberts is a real legend in the business. He is arguably one of the greatest WWE Superstars of all time who never won a World title but is still remembered as one of the best in-ring psychologists and an innovator of the DDT finisher. It could be argued that Jake The Snake was more popular than Hulk Hogan himself. The famous spot with his pet snake Damien biting Macho Man Randy Savage is still remembered to this day.
When it comes to AEW, the connections are quite clear. Jake Roberts was the dealer in the "Road To All Out" YouTube videos for the women's Casino Battle Royale match, handing out the cards to the various female wrestlers. He's also a regular at Starrcast and he will be attending Starrcast 4 on the same weekend as AEW Full Gear.
Female superstar says she inspired John Cena turning heel HERE
Furthermore, Jake The Snake has a very important connection to Diamond Dallas Page. Many wrestling fans may know by now that Jake Roberts struggled for many years with drugs. Thanks to DDP, he was able to overcome his addictions. Given DDP's connection to Cody, it's highly likely he could be one of the three judges at Full Gear.