Overlord is simply THE quintessential evil protagonist light novel. Can be found at http://skythewood.blogspot.com/p/knights-and-magic-author-amazake-no.html. 

Great novel about a protagonist who is in the long sight of things not strictly evil but is truly a piece of sh*t and deserves... more>> to be on this list. <<less

Really really really good. The main character has development throughout the story. Some side characters get development while others are 2D, but what can you... more>> do. There are some crappy aspects, like how some story threads don't go anywhere and just get dropped, and the power stuff isn't really explained very well, but there's decent word building and really good character development. I highly recommend it. <<less

Youjo Senki is pretty incredible as well, definitely on the level if not better than Overlord. Unfortunately, the light novel version isn't very updated and... more>> is difficult to parse through; I instead recommend watching the anime instead.  <<less

Super good but not that many chapters, I MTL'd it for a bit. Highly recommend. Plays off the "misunderstanding" trope a lot so if you... more>> don't like that don't read, but there's a lot of world-building and views from other people's POVs that makes the novel something special. <<less

As good as The Lazy King, Death God is more action based. Can be found at http://moonbunnycafe.com/the-girl-who-ate-death/. 

Very good. Most of it can be found on webnovel (https://www.webnovel.com/book/7860061006001305/Dark-King). Read it there before continuing to the next site it's at. 

WMW is very good, and is completed as well. Can be on Webnovel (https://www.webnovel.com/book/8058923005003605/Warlock-of-the-Magus-World) and WuxiaWorld (https://www.wuxiaworld.com/novel/warlock-of-the-magus-world). Pick your poison, both are the same. 

Ridiculously good, and completed. Can be found at https://yoraikun.wordpress.com/tlk-chapters/. 

MJ scratches all of the itches and comes with an insane plot twist at the end of the first arc. Can be found at https://www.webnovel.com/book/8335353205000005/Mystical-Journey. 

By the same author as Mystical Journey, Way of the Devil is similar, but doesn't have the same plot twist MJ; still a very good... more>> read if you liked MJ. Can be found at https://www.webnovel.com/book/7940017306001805/Way-of-the-Devil.  <<less

Very good, KotB is a second chance/back in time novel if you're into that kind of thing like I am. Found at https://myoniyonitranslations.com/the-king-of-the-battlefield/. 

Pretty good but also very slow at the start, can be found at https://rosietranslates.home.blog/secret-organization-toc/. 

It's pretty decent in quality. Better than most of the tr*sh being translated, the first half of the translations can be found at https://larvyde.wordpress.com/akumari/. 

Really good, but is unfortunately dropped by the author around chapter 80 something and is being translated at a snail's pace at https://www.yamitranslations.com/p/ouroboros-record-circus-of-oubeniel_62.html. 

My House of Horrors doesn't technically have an evil protagonist, in fact he's a pretty decent guy. However, the novel is also incredibly well done,... more>> and I want to bring more attention to it. Can be found at https://www.webnovel.com/book/11530348105422805/My-House-of-Horrors.  <<less

The novel has a smart protagonist who calmly plans out his moves, what can I say? It's a good novel and I found myself wanting... more>> more when I caught up. One thing I noticed with the novel is that the power system is rather simple, but it doesn't drag the novel down. A good underrated novel with an evil protagonist - check it out! Can be found at https://www.foxteller.com/novel/198/im-the-most-evil-support-classtalkerand-ill-subdue-the-strongest-clan-in-the-world <<less