LNs where the MC is OP:
() Death March to the Parallel World Rhapsody -- Death March Kara Hajimaru Isekai Kyousoku
() I've Been Killing Slimes for 300 Years and Maxed Out My Level
(*) In Another World With My Smartphone -- Isekai wa smartphone to tomo ni
LN with kingdom building and harem:
(*) How a Realist Hero Rebuilt the Kingdom
LN where something that looks good on paper, but is not (very funny):
(*) Konosuba: God's Blessing on This Wonderful World! -- Kono Subarashii Sekai ni Shukufuku wo
This LN may get you thinking about who is the hero:
(*) The Devil Is a Part-Timer!
This LN has an MC that works hard to become a hero and will do stuff that he feels is right, even if the world turns against him:
(*) Is It Wrong to Try to Pick Up Girls in a Dungeon? -- DanMachi
By the way, I like to follow "Justus R. Stone" on YouTube.... Here is a link to his review of every first volume that he has done so far:
https://www.youtube.com/watch?v=WDnocECiLlA&list=PLxAMc--4Z3bCRIHmaKAgP77mTKu2xY3y3
Enjoy,
http://about.me/rerdey