Your Favourite Underrated C-Actors and Actresses?

This year there were some lower-budget dramas that became extremely popular both domestically and overseas, with quite a lot of attention around casting (especially for actors and actresses that were relatively unknown beforehand). I'm thinking here specifically of Meng Ziyi and Li Yunrui's recent (and well-deserved) ascent in Blossom (2024), but this was also the case for the Korean drama Lovely Runner (2024) starring Kim Hyeyoon and Byeon Wooseok.

Both series featured casts that either were in the industry for a while before getting their big break, had acting skills that had yet to acquire the attention they deserved, or had mostly worked as side characters/side roles before their hit performances. So what are some of the actors and actresses that you think fit into this category, and are they in any upcoming dramas or shows that you're really forward to? What made you notice their acting and why? And what are some of your favourite performances by them, regardless of whether or not the role is a leading one?