Fairy Tail
Complete | Mashima | 2006 released
Writing quality varies is my only complaint. The reason is simple: The author has major issues with his publisher and editor in terms of quality and quantity and this only gets worse the farther you go into the series. Hiro Mashima was restricted in several instances from doing what he wanted with the series. An unhappy author makes an unhappy narrative.
Nanatsu No Taizai
Complete | suzuki nakaba | 2012 released
A breath of fresh air in Shounen. It uses tropes the way they are meant to while still pulling originality out god knows where!
Darren Shan