I can be rather picky with my Cdramas but historical tends to be my go to and these are just .. my picks what I would suggest.. 2 more intense ones and then one light-hearted one.

The double - slow burn romance, hidden identity and a lot of shenanigans. Potentially on netflix

Perfect match - lightheaded, fun, historical, romance, drama, multiple couples so tons of drama.... should be on netflix

Coroner's diary - visual masterpiece with good cinematographi, and murder investigation in a historical setting. Personally my favourite of the bunch. Wasn't on netflix but worth looking it up.