Actually that was a great resource. I looked up all the names of people who promote this diet to find out when they died, so I could calculate all-cause mortality of people promoting carnivore versus people promoting any one of (mediterranean, vegetarian or vegan). Most are still alive (and young).
This "study" of mine suffers from selection bias. I have to pick people who are known, known to have strongly promoted and followed the diet, and who died, and we know what age they died at (the reason they died is not included because that is too easy to fake or lie about or requires us to investigate uncertain causal links -- even when we know it was a car accident for example).
I'm happy to add more people if they are famous and the data for them is published, it's an open ongoing study. To counteract my selection bias, I encourage you to point me to more Carnivore people who lived long, or more Vegetarian people who died young. But they have to be famous known people who publicly promoted the diet.
I added my ancestors to the vegetarian list even though they don't fit the criteria, because their data doesn't actually change the number much (makes it slightly lower) and it just makes it more certain for me that this isn't some mistake.
Carnivore (this group just started with your data, thank you):
Owsley Stanley: 76
Vilhjalmur Stefansson: 83
Barry Groves 77
Walter L Voegtlin 71
Blake F Donaldson 73
Atkins 72
Dr. Alfred W Pennington 56
Charles Poliquin 57
Average: 70.625
Mediterranean, Vegetarian or Vegan:
Dame Harriette Chick 102
Caldwell Esselstyn 90
Blackburn, Henry 97
John Harvey Kellogg 91
Ancel Keys 100
Jack Lalanne 96
Nathan Pritikin 69
Jeremiah Stamler 102
Ellen G White 87
My G. Great Grandma Gass 99 (SDA vegetarian)
My Great Grandma Paxton 89 (SDA vegetarian)
My Grandma 79 (SDA vegetarian)
Average: 91.75
Seems like the carnivore people die 20 years younger.