You know, the main reason I didn't comment here earlier is that I find it basically impossible to narrow it down to 5. I'm always bumping against MAL's stupid "maximum 10 favorites per category" limit, where to make matters worse they decided that all real people are a single category.
That said: for voice actors, I distinguish between "breadth" (the range of different characters they can convincingly play) and "depth" (the acting skill of portraying a character realistically through a wide range of situations and emotions).
There are some seiyuu that excel at one of these dimensions. E.g. Atsumi Tanezaki has amazing breadth, from Mizore to Vivy to Anya to Futaba. Also Yumiri Hanamori.
Tomoyo Kurosawa has great depth, I don't think there is any other seiyuu who can play a teenage girl as realistically as her, with all the little vocal quirks.
But the greatest have both, breadth and depth. HanaKana, Aki Toyosaki, Nao Touyama, Maaya Sakamoto, Saori Hayami are in that category for me.
Thank you for coming to my TED talk.
I paused the episode and wanted to yell at the screen when they did that. Stupid misunderstanding romcom tropes make me want to drop a show immediately.
Pulled myself together though and continued watching, and thankfully this one doesn't seem to play out as I feared. It might even have given Yamada the necessary push to give Yukari a clear answer... which can only be a no, right? RIGHT?
Akane's confession got Yukari-blocked, but that scene in front of the konbini with her and Yamada was very sweet. Almost as good as a confession.