Both the Dunn and the Biggs things came organically though. The Dunn one was before my time, but reading on here over the years, the committee thought he was ancient back in 1987, and things sort of fell into place from there by accident. (As noted by their ability to drop him from the list several times in the 90s!) As for Biggs, he was described as an Ambassador when they liked to give joke descriptions for folk (see Ronald Reagan, idiot). When Biggs saw the site (after he'd been on it for a number of years), he decided to run with the idea of being the Deathlists actually ambassador, as opposed to ambassador for running off to foreign countries and giving the police laldie.
So to arbitrarily go "Oh, so and so is the new ambassador/Deathlist favourite" misses the point.
There will be such folk in the future, but we'll know them when they appear, rather than try to coronate someone.