Emperor's Domination ? Overlord (LN) http://www.novelupdates.com/series/isekai-mahou-wa-okureteru-ln/ http://www.novelupdates.com/series/utsuro-no-hako-to-zero-no-maria/ Edit: If you don't mind reading rrl novels then you can also give these two a try: Number one under the heaven Legacy:God's inheritance
There are so many.. http://www.novelupdates.com/series/release-that-witch/ - Dude is seriously OP to hell and back. His OP memory is key to his success and he manages to make amazing stuff, with witches, a good read. http://www.novelupdates.com/series/genjitsushugisha-no-oukokukaizouki/ - Similar to the above but in a different way but still using modern knowledge, however he is inspired by Machiavelli, using cunning and strategy to rule, he also has some magical ability which is OP, might not seem like it, but it seriously enhances his abilities. http://www.novelupdates.com/series/overlord/ - OP overwhelmingly so, game character transports to another fantasy world with all his OP items and base with OP minions under his rule, imagine if Ice Crown Citadel with the Lich King (world of warcraft if you are familiar with it) was transported too Game of Thrones. http://yukkuri-literature-service.blogspot.com.au/2015/06/onw0-1.html - This is an original story from the translator who did Genjitsushugisha no Oukokukaizouki which I listed already , very similar to Overlord, but instead of just one transmigrator we have several. https://www.reddit.com/r/HFY/wiki/ref/universes/jenkinsverse/chronological_reading_order - This link takes you to a series about how OP humanity is compared to the other Alien folks out there in space, what is listed is the suggested reading order, otherwise you might get confused, there are many authors to this, so that is why it is listed like this. These are just a few Ive listed hopefully they are to your taste, some might not appear OP but really they are over the top, and all are great stories, will keep you going for a few days.
dungeon defence political intrigue and war of both the mind and the body akuyaku reijo ni koi wo shite a man discriminated on his eye colour becomes a valet for a young and misunderstood noble. a similar feel to dungeon defence as both mains are cunning and act as the hand behind the curtain.
Martial World Strong will, foundation, destiny, battle force, skill, soul, etc.... You could try Everyone Else is a Returnee too
Tales of the Reincarnated Lord World of Cultivation Perfect World Emperor's Domination The Strongest System Library of Heavens Path History's Strongest Senior Brother History's Number 1 Founder