Jikuu Mahou de Isekai to Chikyuu wo Ittarikitari : http://www.novelupdates.com/series/jikuu-mahou-de-isekai-to-chikyuu-wo-ittarikitari/ Similar in op protag, gets a harem and never does anything with them, Hides his abilities for the most part but still uses them when needed. however hes not as op as the MC in Death March, it don't have loli's, and he isn't as easy mode as deathmarch is.
http://www.novelupdates.com/series/close-combat-mage/ Same type of story except his harem members are not his slaves, his passion is alchemy and not cooking, and goes on a journey to find his missing father (instead of vacation). One minor thing is he actually has sexual encounters with his harem members. http://www.novelupdates.com/series/slave-harem-in-the-labyrinth-of-the-other-world/\ MC is more of a cheater than OP (still OP compared to normal people but to afraid to use those abilities). Story is slice of life focused (with MC introducing several different types of foods that come from monster drops) with the action being focused on dungeon exploration. Also, all of the slaves are adults and are sold as sex slaves to the MC (which he makes sure to enjoy every inch of his girls). The slaves are non-humans including beast-kin, dragon-kin, dwarf, and elfs. My opinion, less OP MC version but adult version of Death March. http://www.novelupdates.com/series/divine-protection-of-many-gods/ Similar to Slave Harem but with lolis (so closer to Death March) and much more action focused (no quest for food ingredients). Also plenty of sexual interactions between the loils and their master. http://www.novelupdates.com/series/konjiki-no-moji-tsukai/ MC is summoned to a fantasy world but decides to not follow his classmates turned heroes and decided to tour around the world looking for good food. MC's cheat ability makes him OP. MC does tend to break the flags of lolis wherever he goes, but they don't stay with him at all times (but do go yandere on each other). http://www.novelupdates.com/series/...mination-building-a-slave-harem-from-scratch/ OP MC (due to his martial arts) is transported to a fantasy world. MC acquires female slaves (both beast-kin and humans) and likes to turn out his magic on them (very ecchi similar to To Love Ru but MC does not have sex with them).