I love kind male leads! As far as historical dramas I think these ones fit what you are asking for best.
- Ashi Girl
- Dong Yi
- Shuttle Love Millennium (the character Zhang Zi Gang)
- The Legend of White Snake
- An Oriental Odyssey (spoiler: vague ending that could be interpreted to be sad)
- Queen In Hyun’s Man
I also have a list on my profile of puppy male leads that includes more modern dramas as well. I wouldn’t say all the male leads on that list are elegant but they are all kind. A couple of modern ones on that list that have both kind and elegant male leads are Innocent Love and Kimi Wa Petto (2017).