Mystic Manor by Jekei (most like HH). Wartribe Academy by Mr. Rooster. Lucky Paradox by Stawer. Love's Champion by Grimaga. Hero's Harem Guild by Komisari. The SHRiNK by OneManVN. A House in the Rift by Zanith. Confined with Goddess by Enroniverse (the simplest in terms of progression, and it's the only one that is actually complete). (I said half a dozen and I deliver). Good clean sandbox harem fun: no mind break (psychic murder), no MC f**king his own mother and sister.