Some of the games I've played that haven't been posted here yet:
Bloodstained: Ritual of the Night: Taking most certainly from the "vania" part of metroidvania, this is an insanely deep and well paced metroidvania. One of my personal favorites in terms of being castlevania spiritual successors. It's good to see that Igarashi still has a good sense of design.
Environmental Station Alpha: This one is a bit harder to recommend because it is for a very specific audience, of which I'm only partially in. To get the elephant out of the room, this game is hard as balls, and I don't mean the combat.
The combat is quite fair and fun, and platforming generally is too. This game's difficulty comes from very esoteric puzzles, lack of indication or tracking (you are expected to notice very minute details and physically write them down in many cases), unclear progression in lategame, and similar things. As such, I can only really recommend this game if you like a head scratcher as part of your metroidvania experience. It's very solid if you do.
Iconoclasts: This game is one I have a lot of conflicted thoughts on. Overall I would recommend it because it's very pretty and the story is cool, but the gameplay often left me a little disappointed.
Islets: Extremely well paced steamlined metroidvania with satisfying movement and combat. Very easy recommend.
No corpse runs, no currency loss, no spell meter management, no skill system or RPG stats, just basic swordfighting and a recharging bow with HP, damage, and ammo upgrades. Difficulty on Normal is engaging while not ever feeling unfair, and difficulty can be changed in either direction at any time. Platforming challenges are quick and flow well.
If you're tired of how sluggish and bloated a lot of modern games in this genre can feel, Islets is an amazing relief with a beautiful art style.
I can easily recommend both Ori games as well. It's been ages since I played them so I don't have a detailed review, but they're both extremely solid games, especially Will of the Wisps.
Supraland and its sequel,
Supraland Six Inches Under: Both of these are absolutely amazing 3d puzzle metroidvanias. I would put these closer to something like "what if Portal puzzle design but metroidvania" rather than anything standard.
At its core, they're puzzle games. You will spend the majority of your time trying to solve puzzles. These puzzles are sometimes clearly marked, other times navigating a specific environment is the puzzle. Puzzles consist primarily of attempting to either reach difficult-to-access areas to press buttons (which will permanently open the way, you almost never have to re-solve puzzles), or finding a way to activate various special switches that require more than a press to use. Puzzles are solved primarily using your tools that you receive throughout the game (most of which double as weapons).
They do feature combat as well, but the focus is weird platforming and puzzles. Writing in these is certainly subpar unfortunately, but if you don't care about that these are extremely solid games.
Yoku's Island Express: This is a
pinball metroidvania. How cool is that? Game's super neat and fairly compact, can probably beat it in 1-3 sessions. I really enjoyed this one even if some "platforming" sections could feel a bit finicky.
Also signal boosting Psuedoregalia, both Blasphemous games, both Guacamelee games, they're all amazing.