Aroma66:
Try watching "Eternal Love of Dream" if you haven't before. The Male Lead has white hair, The story is really good. Watch at least 5 episode to be sure whether you want to keep watching it or not. If you give this a try you won't regret it, acting, chemistry, story, OST all are amazing.
Second one I would recommend is "Princess Silver" both ML and FL had white hair for a brief time.
If you have any questions related to these dramas feel free to ask.
oh, I did want to watch Eternal Love of Dream but don't know if I have to watch the prequel. Also, it is always difficult for me to understand all those concepts in fantasy dramas especially ones in foreign language. I think I will eventually watch it due to their cast
I also don't mind if the leads are blonde-haired,so plz leave recommendations if anybody comes across any