Historically: Ceb, Heen, maybe Artstyle?
Currently: Heen, xiao8, and... Bulba?
I'm not the biggest fan of Bulba as a coach but he did also coach a team through a TI win, so there's always that. That and the players seem to always want him around so there's only so bad he could actually be.
Definitely could use some opinions of fans fans of Chinese Dota, as I know next to nothing about coaches in the Chinese scene.