Nirvana in Fire, its like the Chinese version of Alexander dumas count of Monte cristo. This one is so Epic. The best drama ever. A must watch. @.@
Others that are like City Hunter in its revenge plot with romance as the side story. Dramas that are pretty good dramas are:
A Story of a Man
The Devil
Resurrection
Girl k
Soul
And maybe, not full on revenge story but more of retribution plot: Bridal Mask and Heartless city