You might want to take a look at EdgeDB. You still have to define a schema, but both its data model and query language have much smaller mismatch with popular p

You might want to take a look at EdgeDB. You still have to define a schema, but both its data model and query language have much smaller mismatch with popular programming languages and APIs, so you don't need a complex ORM. For example it has first class support for following links (instead of awkwardly joining on foreign keys), outputting nested data and polymorphism.