Concept: Man is reborn in MHA as the brother of Yo Shindo, taking the power of the Gura Gura No Mi. Nevertheless, the main character goes incredibly Micro on the ability, focusing on improving control over his powers. He can fly, repel things and even control electromagnetism.
After all, it is capable of some insane feats if used correctly. For one, He could phase through things, doing a reverse flash chidori type of thing. The kid starts out with the same, large-scale destructive powers as Whitebeard before recognising his own intelligence, not limiting himself to such crude powers.
I never got round to writing this story, but I'm quite comfortable in my knowledge of MHA.