I chanced upon a good friend of my decked in Hanbok during her trip to Korea earlier on of the year and since I am going to Korea too and would love to try on the traditional costume, I asked her for the place where she rented the hanbok.
Her recommendation was Oneday Hanbok.
I googled the shop thereafter as well as browse through their Instagram. They have a wide range of Hanbok and have multi-lingual staff. Additionally, the store is located near the vicinity both Gyeongbokgung and Bukchon Hanok Village, where you can take artistic shots in the Hanbok.
The website of Oneday Hanbok states that it would be recommended to make a reservation with them, which I did for an 11 am slot.