>>81889576Objectively speaking the answer is Gura, but she rots hololive culture by doing nothing and being rewarded by the millions for it. chumbuds are like the fifa fans of hololive: there are lots of them but they don't interact with other fans that much.
Suisei had the most success in music, is ambitious and a great merch seller but brands herself as a diva more than an idol. She's not great for hololive culture either.
IMO Pekora is the one carrying hololive on her back. She streams everyday, sometimes multiple times a day, and hosts these big events like the ongoing ark server that could encourage other holos to network and stream more. If someone is afraid of joining she even contacted them personally.
https://www.youtube.com/watch?v=zjv-ZDqQ3uoAdditionally, Marine is a social butterfly and always takes runts under her wing. Pekomari are the true leaders of Hololive.
Not that any of it matters though, since all of them under the blue dorito belt so one success bleeds to another.