There’s a significant difference between the three mentioned characters and random NPCs in RDR 2’s gambling because those names appear to be randomized. Dixon, Gillies and Eastep are set characters that appear every time.
Also, there are plenty of articles detailing characters from the first Redemption that do not contribute to any other article, as you say Bradley Hunt contributes towards the lore of the Night Folk.
Also, it’s hardly reasonable to compare this to NPC’s horses considering all they need is a mention on their owners page. These are characters we are talking about, however minor of a role they play.
And it’s not undemocratic to throw another user under the bus. But t should be out to a user vote, you absolute despot