Entertaining is a subjective metric since people like different things. The only numbers you can quantify on F U N are "appeals to more people" and that's about it. Hololive is also popular, and it's always a good idea to make them try things you want them to do since that usually trickles down to other vtubers down the line. They're also big enough to do whatever the fuck they want and still get away with it, for example, Mori choosing World of Darkness instead of settling with >DnD like some fucking scrub. If anything, for the complete vtubing experience I would recommend watching Hololive and 2views, and ignore everything in the middle. Because only 2view indies do what they want instead of appeasing the crowd, and it's exactly in their self-sabotage that they stay 2views, but happy. The bigger ones are obvious algorithm-chasing numberfags and thus design their content around maximizing their reach and appeal, compromising their content.