Thread:Faxinnh/@comment-28541692-20161203070001/@comment-29966464-20161203163540

Madoka vs. Nanashi: Teenage monster-slayers who once were ordinary young children until a fateful event forced them into an adventure that turned them into beings far stronger than a normal human, waking up in monsterous circumstances after dying, and contracting with someone to save their life, which is how they ended up in their adventure in the first place, eventually leading to them defeating the root of all evil in their series, transcending space-time, all limitations and the very laws of cause and effect, effectively making themself godly beings as a side-effect, and now are forced to watch over the multiverse, thus made the ultimate sacrifice, even worse than dying.

As for Simon and Johnny these are what I can remember: Powerful anime protagonist (manga for Johnny's case) who went on an adventure due to the their mentors however both also died during a penultimate battles against the enemy forces (Kamina got killed by the Dai-Gurren Brigade while Gyro died during a fight against Valentine), thus inspiring and influecning our young main protagonist to learn more about themselves and their power. They possess powerful energy which throughout the series made the protagonist even stronger and powerful. There are many more but you can either ask RoaringRexe or Digger.