The Rushing Winter series by Aaron Cowan(Sage Dynamics) has been consistently pretty good. I just finished book 6 the other day and enjoyed it quite a bit. The story is a bit like Jason Borne or Mitch Rapp; a highly trained assassin who rebels and tries to discover himself kinda thing. As the series progresses the story gets fairly deep with lots of characters and organizations and some decent lore. The action can be pretty over the top in places, but still feels grounded due to how it is written and how the character develops over time.
Cowan does pretty well for not primarily being a writer and I think the books do get better as the series goes on, however they all suffer a bit from excessive wordiness in places and can drag from time to time and there are a couple editing/proof reading errors.
https://www.amazon.com/gp/product/B0...oreType=ebooks