The way those stories handle dynamics can get incredibly detailed, almost like a social experiment. I read one a while back where the author set up a harem not just around Harry, but explicitly around the idea of him being a 'sanctuary' for characters who felt isolated in the wizarding world—Luna, Hermione, a redeemed Daphne Greengrass, and even a version of Fleur who wasn't just a veela stereotype but someone struggling with the expectations of her heritage. The focus wasn't purely on romance; it was on building this fragile, supportive network where each relationship filled a different emotional niche for him and for each other. Hermione provided structure and intellectual partnership, Luna offered unchanging acceptance, and so on. The tension often came from managing those overlapping connections and the external prejudice against such an unconventional family unit. It felt less about wish-fulfillment and more about exploring a radical alternative to the nuclear family within that magical framework, questioning the very traditional relationships shown in the original series.
Of course, a lot of it is just power fantasy, I won't deny that. But even within that, you see interesting shifts. When Harry is written as overly dominant, the group dynamics tend to flatten into sycophancy, which gets boring fast. The better ones, in my opinion, let the conflicts between the women exist and get resolved through dialogue, not just Harry's decree. I remember a particularly well-regarded story where the central drama for several chapters was Ginny and Hermione working through lingering jealousy from their canon history, completely independent of Harry's intervention. That kind of attention to the intra-harem relationships is what separates the thoughtful explorations from the lazy list-making.