I personally stick with H3H3 on this one, however the DMs that Leafy posted did seem a bit shady. I might be a tiny bit biased because I like H3H3s videos a lot.
For people who don't know about this drama, I'll put the details under a spoiler.
I think channels like I Hate Everything (IHE) and GradeAUnderA fit into that category as well, even though they don't do the same type of reaction videos.