Whoa it's funny you mentioned historical kdrama, because I just finished the mother of all historical kdramas, and I highly, highly, HIGHLY recommend it. It's called Mr. Sunshine (2018), you can find it on netflix (if you use that), but I found it elsewhere online for free with correct subtitles.

The most stunning cinematography and acting, it's far and beyond better than any modern movie (add to the fact that there's no wokeness, it was like a breath of fresh air). If you have the time, please give it a watch, you will not regret it.

Brief summary: Takes place roughly from 1871-1907 during a time when Japan wanted to colonize Korea; and other countries like the US, Russia, and China were getting involved as well. Follows 5 main leads, all Korean but one stowed away to America and joined the US Marine Corps then came back to Korea as a Marine Corps Captain. There's a noblewoman, a son of a nobleman, a Korean samurai (with beautiful long hair may I add), and a wealthy hotel owner. All such amazing characters that I can't get out of my head.

If you don't know much about Korean history, this show will tell you a lot, and honestly I'm so glad to have watched it because I know so much more about their struggle for independence now.