The Merchant: Gaekju 2015 (2015)

Genres: Historical, Business, Melodrama, Political
Tags: Insider Trading, Manipulative Male Lead, Sly Male Lead, Separated Family, Noble Sacrifice, Wrongfully Accused, Scheme, Jealousy, Corruption, Joseon Dynasty

The Merchant and The Great Merchant are both
- historical sageuks
- about great merchants
- set in Joseon
The Merchant is a fiction about a male merchant, whereas The Great Merchant is based on a true story about a female merchant

(I'm sorry if this sounds like a strange recommendation!!!)
Lee Duk Hwa plays similar (and adorable) characters in both of these dramas. Both characters have high political status, love children and aren't romantically loved. I personally pitied the characters. Even though he was so adorable he only suffered :(