>>10485249I'm assuming you don't know any Japanese going by your choices, so I'll suggest just following clip compilation channels like Mofumofu and Etherald to get a taste of people. There's an absolutely massive variety of people in Nijisanji, so it's hard to recommend one vtuber that fits anyone without knowing them better.
Going of what you mentioned as your likes though, I'd suggest looking for clips from Sayo, Mito, Mayuzumi, and Mashiro, if you want to see creative applications of the l2d format, would also recommend Pomu's streams from the EN side, especially her Pomura Date. Besides that try Chima, Melissa, Ryushen, Inui, and Sou Hayase if you want great singers (there's a ton more fantastic singers in Niji, these are just my favs, for the EN side Elira's the best one), and try Layla if you want to see someone who's history focused (Lumi from Cyberlive is also another cool chuuba to follow for this).