>>279560534
Easily Satoha.
The contest for second place of that department is a decent bit more interesting, there's a lot more to consider.
Nodoka, Hisa, Hiroe Atago, Kyouko Suehara, Mihoko, Ako. Touka would also probably be a contender if not for the fact that every time she's played, she's massively distracted by Nodoka, so we've never seen her play at her best (not counting her cold form)