Here are some of my favorites:
https://mangadex.org/title/792/tonari-no-kaibutsu-kun (It does have a bit of drama but most of it only lasts one or two chapters)
https://mangadex.org/title/15722/tomo-chan-wa-onna-no-ko (Tomboy and childhood friend)...
You're right isekai is a genre that has gotten boring. Isekai could actually be an amazing genre but authors are afraid of making something that nobody likes so they just stick to the basic formula of Slave girls, Adventurers guild, op MC, Royal Academy, etc.
Well i have been deceived twice by EA because i bought Mass Effect Andromeda and SW Battlefront 2 at release, those purchases haunt me to this day mostly because releases in my country are usually R$250 or R$300 (BRL).
Finding isekai manga with at least an ok story is kinda hard, i'm really not picky about clichés and stuff but some isekai manga take clichés to the next level and base the entire story on that, so lets share some isekai manga i'll start: Mushoku Tensei and Isekai Nonbiri Nouka.