As a kid Yukon was my favourite character in The classic Rudolph stop motion TV show.
As an adult, I reckon Yukon Cornelius was a FSSF veteran who fought in the Aleutians in WWII before going OGA and retiring to the remote wilderness to get away from all the planet's idiots.
I also reckon Herbie who "wants to be a dentist" might make a decent 18D candidate if he applies a bit more effort to his fitness level.
Herbie's role in providing austere environment dental care to the Bumble certainly provided an opportunity for Yukon Cornelius to turn and leverage the Bumble in a classic "by, with, thru" low visibility influencing/shaping operation.
Fashion wise, Yukon Cornelius is clearly the standard on which hundreds of coalition SOF soldiers and OGA folks modelled their daily wear and beards.
So Rudolph has more prescient SF stuff in it than John Wayne's Green Berets.