What anime openings masterfully blend music, visuals, and mood across eras?

[Jonathan99]

I've been an anime fan for years, and I'm putting together a personal playlist of what I consider the best anime openings, but I'm sure I'm missing some incredible tracks from shows I haven't seen or from older series. My list is heavily weighted towards recent shonen hits and a few classic 90s tunes, but I want to expand my horizons. For other enthusiasts, what openings do you think are absolute masterpieces in terms of their musical composition, visual storytelling, and how perfectly they capture the essence of the series? I'm looking for recommendations across any genre or era, from the iconic synth of the 80s to the latest viral J-pop hits, especially those where the opening sequence itself is a work of art that enhances the viewing experience every single time.