Saint Seiya! It's an oldie but a goodie that's kinda had a bit of buzz around it lately. Mostly thanks to the terrible Netflix show and the live-action movie in the making(that I hope won't be terrible, but I'm preparing for the worst.
This series is so good though, even though it's a pretty straightforward shounen. It's heavily influenced the genre with the creators of both Bleach and Naruto crediting it as a source of inspiration. Also it combines gratuitous violence, drama, and Greek mythology in a cool way. Added points for having an amazing soundtrack and especially the opening. I'm just sad they never finished the Lost Canvas and the Heaven chapter.
Imma stop now because I could write a thesis on this series and the injustices it has suffered! 