All classes that implement BaseFormIdInterface

class \Drupal\Core\Entity\EntityFormController implements EntityFormControllerInterface
class \Drupal\Core\Entity\EntityFormControllerNG
class \Drupal\action\ActionAddFormController implements EntityControllerInterface
class \Drupal\action\ActionEditFormController
class \Drupal\action\ActionFormControllerBase implements EntityControllerInterface
class \Drupal\aggregator\FeedFormController
class \Drupal\block\BlockFormController
class \Drupal\comment\CommentFormController
class \Drupal\config_test\ConfigTestFormController
class \Drupal\contact\CategoryFormController
class \Drupal\contact\MessageFormController
class \Drupal\custom_block\CustomBlockFormController
class \Drupal\custom_block\CustomBlockTypeFormController
class \Drupal\entity_test\EntityTestFormController
class \Drupal\field_test\TestEntityFormController
class \Drupal\menu\MenuFormController
class \Drupal\menu_link\MenuLinkFormController implements EntityControllerInterface
class \Drupal\node\NodeFormController
class \Drupal\picture\PictureMappingFormController
class \Drupal\shortcut\ShortcutFormController
class \Drupal\taxonomy\TermFormController
class \Drupal\taxonomy\VocabularyFormController
class \Drupal\user\AccountFormController
class \Drupal\user\ProfileFormController
class \Drupal\user\RegisterFormController
class \Drupal\user\RoleFormController
class \Drupal\views_ui\ViewAddFormController implements EntityControllerInterface
class \Drupal\views_ui\ViewCloneFormController
class \Drupal\views_ui\ViewEditFormController implements EntityControllerInterface
class \Drupal\views_ui\ViewFormControllerBase
class \Drupal\views_ui\ViewPreviewFormController implements EntityControllerInterface