Most successful youtuber in his time?

Who is the most successful youtuber from DE for you? It is not about the current time but in its heyday and only about Youtuber and not twitch insta etc. Etc. In my opinion it is Gronkh, because he had the greatest reach in his time.

For me, that's Julien Bam.

Weird kids channels with dubious background

Rainer Winkler