I dunno, among Tsunderes my favorite is probably Shana, because she’s what I consider to be a much more, for lack of a better word “subtle” example of a Tsundere.
Most other Tsunderes are violent and moody with their would-be love interests out of nervousness/fear/insecurity about love and romance. On the other hand, romantically speaking Shana is a blank slate, and acts irritable around Yuji more or less just because he irritates her. When she starts feeling an attraction towards him, she has no clue what it is or what to do with it. A nice subplot of the series is her figuring out how to understand her feelings for him.