For some reason, developers (mostly the Japanese ones) love putting fishing mini-games in RPGs, it's a tradition that goes further back than many even realize. But the question is, who did it best?
I can't list them all, but fishing has been prevalent in either all or at least one game of series such as Breath of Fire (probably the most famous example, and one of if not the first to do it), Pokemon, Legend of Heroes, Final Fantasy, Dark Cloud, Atelier, etc., and some in the "If you consider these RPGs" like NieR: Automata, Zelda, and Monster Hunter.
I think Final Fantasy XV may have the most in-depth fishing, but is it the best? I particularly love the button mashing of Trails of Cold Steel, because I'm a quick-time fan, but I don't know that I'd call it the best.
What say you?