Good list, you seem to have everyone here. Just to add to the reason why some of these guys died: Bobby Ducman, Renegade, Texas Tornado- Kerry Von Eric, and Crash Holly all committed suicide. Earthquake died from cancer, Dino Bravo was murdered gang land style in Canada (he was apparently in the Canadain mob or pissed them off), Yoko died from a heart attack because he was so big.
A lot of these guys have died because of heart attacks due to stress on their hearts from pain pills. Guys like Eddie, Pillman, Curt Hennig, Rick Rude, Hawk etc. That's why the WWE suspended Kurt Angle this summer because everyone backstage basically had a lotto on what day he was going to drop dead. When Angle threw a fit about it and wanted to get back into the ring the WWE fired him because they didn't want a major star dying. Also guys like Benoit were told to take time off to heal. This is also a reason why the WWE stepped up and now has a real drug testing policy.
Anyway I wouldn't be surprised to see that Jake "The Snake" died. He's extremely messed up if anyone has ever seen "Beyond the Mat" it's a good movie.