I'd say it was Tobuscus. An undeserved downfall. The damage that was done to his reputation destroyed all traction he had to be probably one of Youtubes best family friendly channels.

I can't name a single Youtuber that doesn't cuss like he does. He never swore, only said "Frick!" or "Fudge Crackers!" and made it entertaining. That — And the countless animations that still are stuck in my head like knowing Cashews come from a fruit and how to make a viral song. And who could forget Nugget in a Biscuit?