[wing328hk]

I agree with you that some generators are less mature. For example, we just added a Crystal client generator several weeks ago and we only have tests for posting a JSON body and getting it back to verify the result. Features like oneOf, anyOf are not yet supported (of course we welcome contributions to improve the Crystal client generator).

You can use customized templates (e.g. via -t option in the CLI) to meet your unique requirements. Another tips is to use code formatter such as https://prettier.io/, eslint etc to format the auto-generated code based on the style you want.

Please open an issue via http://github.com/OpenAPITools/openapi-generator/issues/new if you need help with OpenAPI Generator.

Disclosure: I'm the top contributor to OpenAPI Generator