I don't think there are many gatekeepers.
People have disagreements on the forum. They don't typically seem to think the person they disagree with is a disinfo agent.
Yet if they can get 10-20K Youtube views per video they might be thought of as a gatekeeper/disinfo agent.
The most likely reason why someone doesn't talk about the Jews, for example, is out of fear or thinking it's crazy talk. Other than blacks, there are probably not many people who believe in JQ. So it's no surprise few people promote it.
I was thinking about this in relation to what
@Dr. Howard mentions. There are a lot of people who think major corporations are part of the far-left. A more likely situation is they are primarily paralysed by fear of HR and SJW mobs. Imagine you are on $5 million a year and angry Shaniqua and DeShawn from HR are up telling you you need to do a campaign on how fat, black trans people are being killed. For the average person the security of the $5 million is a huge weight on not doing nothing. Leftists have created that corporate Achilles' heel. To a considerable extent corporates have fluffed diversity by stuffing their internships full of muh victims. That was the Trojan horse.
But with that said, if there were people that were specific gatekeepers my best bets would be Laruen Southern and Glen Beck. And Charlie Kirk and Ben Shapiro, but their nature is slightly different.
It's not difficult to go out and find people who believe what Don Lemon or Charles Krauthammer think. It's more difficult to find JQ people.