When I think of influencers, I see commercial creatures without depth. I don't think a forum like this needs gurus or mouthpieces - as we go along along we get an ever shifting set of people who have learned and want to share, and hopefully build a community around that. I've known a couple of 'influencers' in the aquarium world, and not one has struck me as someone I'd maintain a conversation with. They sell with energy, and aren't great listeners.
Video is important, more so than writing these days, and it would be nice to see a growth of good youtubers, etc. They might influence the hobby in certain ways. But right now, the hits that the better sites get are nothing in comparison to the gimmicky stuff. Could we help build a better fish culture. Yes, but more through the links we make here with other people.