Generating Content Type at once
There is none, and there probably will not be one. Drupal is modularised, pluggable system. Each and every module can provide it's own field types, validators, widgets. They have custom settings defined in their modules. There are per field settings, and settings specific for a field in a given content type. Module to provide it all on one screen would need to know about all these modules and their form elements, and there are no hooks for that now. It would be a big job to hack it together with what's provided.