I agree that going into all movies blind is best, there are specific types that are best to be blind. I'd say movies where the ending is the biggest plot point like those with twist endings, mysteries, and maybe tragedies. In a romcom or adventure movie, there's a good chance you may already know the outcome. The couple end up together or good overcomes evil. But those movies are enjoyable even if you can predict the outcome. For mysteries or twist endings, if you already know the ending then the journey towards it is less enjoyable.

Other movies that are good going in blind are ones that are so out there part of the fun is watching what makes it so different.

That said, here are the list of movies I think would be great to go in blind:

Old Boy (the 2003 Korean one)
Memento
Everything Everywhere All at Once
Fargo
Shutter Island