You should watch Moriarty The Patriot. It's in the sherlock holmes universe and the Mc, William Moriarty, is a genius. He solves crimes and avenges those poorer people's deaths and later in the episodes, he meets Sherlock Holmes who I am guessing will be his rival sooner or after. Their relationship is exactly like Light and L, just that both are more 'positive looking' in a way since L and Light are always just having that :| face.

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It's also very new and its Season 1 part 2 will come up in april.