>>50146316I have to say that Sakamata is pretty impactful for my dick.
Jokes aside, on the JP side, I'd say that Koyori has the biggest impact simply by the amount of work she puts in. Laplus has/had a chance to be the most influential one too, but a lot of things happened that made her stay low. I think that Sakamata with her singing has potential to grow as the most influential one out of gen 5 and 6, but she doesn't seem to be the type to aim for the top and to be in the center of the spotlight as much as Suichan for example. Overall, holoX have had a significantly bigger impact than gen 5.
On the EN side, it's definitely Gura, followed by Calli. I think it's pretty clear why. Same goes for the ID side with Kobo.
If I had to pick one of all of them, it would be Gura. I don't watch her, but I think it's hard to argue against her being the most impactful one out of them.