Well, 'Sword Art Online' also has elements that can be considered part of a fantasy harem. Kirito, the main character, has relationships with multiple female characters in the virtual world. Then there's 'Date A Live'. The male lead has to go on dates with different spirit girls to save the world, creating a sort of harem situation in a fantasy setting.
One great fantasy harem novel is 'The Rising of the Shield Hero'. It has an interesting concept where the main character is wrongly accused but builds his own party which includes multiple female characters with different personalities and abilities. Another good one is 'In Another World with My Smartphone'. The protagonist gets transported to a fantasy world and attracts a harem of various characters along his adventures.
A rather underrated but good fantasy harem novel is 'Overlord'. Ainz Ooal Gown, the main character, has subordinates, some of whom are female, and as he tries to conquer the new world, their relationships develop in an interesting way. There are also many interesting political and power - play elements in this novel that make it stand out in the genre.
Chapter 315, "New Policies for Long Mountain, Cold Apple Tree and the Silver Mine", is the clearest early answer because it turns Long Mountain's situation into a concrete plot event. Early on, Only the third child, Li Xuandu, was ten years older than her and.... By the end, Based on what those two just said, if I chased after them and killed....
Chapter 332, "Chen Ying's New Discovery, Xia Yuning, Good News Abounds", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. The chapter turns that into something concrete by moving from Li Xuanling was about to speak when Xia Hong's voice suddenly came... to All right, no need for formalities, everyone rise, I've just come to....
Chapter 37, "Those in the know anticipate the transformation, while the oblivious think it's a fashion show.", is the clearest early answer because it turns Flash Change's situation into a concrete plot event.
Chapter 306, "Rebel Collaborators, Chaos and Opportunism, Long Mountain Changes Hands", is the clearest early answer because it turns Li Hu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Go notify the leader, have him quickly bring the main forces back to... and follows through with Your Li Family is unlucky, producing these two little beasts who let....
Chapter 313, "Preparations for Migration, Population Surge, and Placement of Cold Resistance Level", is the clearest early answer because Camp Supply Department finally turns buildup into a real advancement. The chapter turns that into something concrete by moving from From the moment Xia Chuan announced in front of hundreds of thousands... to Children under six receive five pounds per month." ..........
Chapter 335, "Songyang Ridge, Seven Clans Submit, First Shipment of Silver Arrives", is the clearest early answer because it pushes Xu Ning into a new phase or setting. A useful checkpoint is the way the scene starts with In the past, getting married to a lord was wholly different from... and follows through with After passing the City Gate Commander's screening, they gradually....
Chapter 312, "Regaining Focus, Killing, Shock, and Submission (Part 4)", is the clearest early answer because the violence around Li Xuanyan becomes final instead of hypothetical. The chapter turns that into something concrete by moving from During last night's attack on the city, the casualties among the... to Li Xuanyan and Li Xuandu are ordered to leave Long Mountain within....
Chapter 333, "Silver Mine from the Heavens, Yu Yao and Yu Sheng, No Need to Use a Bull Knife to Kill a Chicken", is the clearest early answer because the violence around Han Yue becomes final instead of hypothetical. Early on, Wah..." "Lord, don't rush, there's still another child yet to come,.... By the end, The Skill Workshop was formerly called the Woodworking Workshop, but....
Chapter 328, "Unexplainable Anxiety, Jade Dew Stone, Li Xuanling's Panic", is the clearest early answer because it turns Cloud Jiao Army's situation into a concrete plot event. The chapter gives readers a real answer by opening on Although the Wolf King has been executed, there are still at least... and ending on The half-hour passed in a flash, and seeing the army all set, Xia....
Chapter 351, "Lu Yang’s Plan, Upheaval in Xia City, Sumeru Nightmare, the Prince’s Golden Words", is the clearest early answer because it pushes Zhao Hu into a new phase or setting. It opens with Only after entering the main building can one truly be considered an... and closes on Gu Tianxiong is quite powerful, with strong connections at the higher.... The key payoff is that the chapter closes with Upon Xia Hong mentioning Yang Fa, Lu Yang nodded solemnly.