I liked Metroid Dread a lot. I feel like it's a good starting point for Metroidvanias too because the game does a good job nudging you in the right direction e.g. by closing off certain areas but still letting you explore and figure out where to go. I especially enjoyed the movement, it feels very fluid and satisfying.

The only major issue I had with the game was that performance is really bad in a few encounters. Most of the time it runs fine though. It's also not super long. I prefer a game that doesn't overstay its welcome, but if you're looking for something that is good value for money in terms of playtime there might be better options.