As the primary focus:
- GTO (the manga is way better, but the scans are legendary poor quality in the early-middle arcs)
- Peach Girl
- Koe no Katachi (A Silent Voice), which you've seen, but the manga is way better for what you're looking for.
...probably plenty of hentai.
As a significant focus of a portion:
- Durarara
- Narutaru Shadow Star (not sure how much they show in the anime, since I've haven't seen it in forever).
- ViVid Strike, very notably in one episode.
The good stuff is all still in manga/webtoons.