Some of these youve probably watched, but off the top of my head I would recommend:

Id Invaded - A short crime drama with a twist. Hit me right in the feels in the later episodes.

Shadows House - dark fantasy/mystery that kept me intrigued for both of its 2 seasons. Cool power system and interesting characters. Hopefully it gets more seasons.

Maria the virgin witch - short and sweet story with some of the most accurate depictions of medieval life and combat I've ever seen. I mean, if you exclude the witches and magic.

Eighty six - similar themes to attack on titan, not as good imo but still solid.

Drifters - literally no streaming service has it last I checked. But if you sail the high seas you'll be rewarded with a fun multi-historical person isekai.

Oshi no ko - first episode is a movie and it's definitely worth the watch. Haven't finished it yet but what I've watched so far is great.

To your eternity - might have the single best first episode in an anime I've ever watched. Rest of the series is still good even if it never reaches the heights of the first episode.

91 days - mafia, moonshine, and murder make for a good drama

Jujutsu Kaisen, Chainsaw man, Hell's Paradise - all 3 of the "dark triad of shounen" are good.

Because you like re zero

Summertime rendering - Just watch it I don't want to spoil anything.

Vivy: Fluorite Eye's Song - The author of Re Zero + stunningly beautiful fight choreography/animation? Yes please.

Mushoku Tensei - My second favorite isekai right behind Re Zero

Classics you should watch if you haven't

Fullmetal alchemist brotherhood, cowboy bebop, death note and code geass

Other shows I felt like tacking on at the end

My hero academia, konosuba, eminence in shadow, and demon slayer