If you want a short list right away: there really aren’t many full-on blind protagonists in anime, but two clear examples stand out. The first is 'Daredevil' — yes, Marvel’s Daredevil got a Japanese anime mini-series produced by Madhouse, and Matt Murdock is the lead there, a blind hero whose heightened other senses and moral complexity drive the show. The second is the long-running blind swordsman archetype, most famously embodied by 'Zatoichi'. He’s best known from live-action cinema, but the character’s influence spans manga and animated works too, and when he’s presented in animated form he’s typically the central figure.
I bring these up because blindness as a defining trait for a main anime protagonist is surprisingly rare. More often anime will give main characters temporary loss of sight, a prosthetic eye, or a sensory twist (like supernatural perception), rather than making blindness the baseline. If you’re looking for meaningful portrayals, the two I mentioned treat blindness differently — one through a superhero-comics lens, the other as a folk-hero sword tale — and both are worth checking out for how they handle agency, combat, and sensory adaptation. Personally I love how they challenge the usual visually-dominated storytelling, it’s refreshing to see sight reimagined on screen.