Don't know if I've heard of him or not.
Of the 69 youtubers I actually follow, maybe 10-15 are active at any given time, and of those, I only can actually keep-up with about five at a time ... if even that /:
I also am to the point I rarely take recommendations, anymore, as IMHO, many of the popular channels are overrated, or have gone stale.
I even am finding some of my favorite channels are starting to churn-out tons of content I simply have no significant interest in, or their best videos are getting taken-down by bogus copyright claims. Some even seem to be deviating completely from what i initially had started watching them for. Others still seem to have practically gone dead.
That said, I'll stick with the ones I have, and make my own choices what/who to watch/follow on youtube.