" 

 == Incumbent == 
 If there's anything in the wikipedia or wiktionary entries for ""Incumbent"" that suggests the use of that word in a succession box about longevity, it's exceedingly well-hidden. This is all of a piece with the deeply unencyclopedic view that old age is a contest, whose ""winners,"" ""record-holders,"" and ""record-breakers"" are inherently notable.   "