Below is a list of SEO and related contributed modules I currently use on every project:
https://www.drupal.org/project/pathauto
https://www.drupal.org/project/metatag
https://www.drupal.org/project/schema_metatag
https://www.drupal.org/project/amp
https://www.drupal.org/project/google_analytics
https://www.drupal.org/project/google_tag
https://www.drupal.org/project/googlemap_block
https://www.drupal.org/project/simple_sitemap
https://www.drupal.org/project/simple_sitemap_views
https://www.drupal.org/project/recaptcha
https://www.drupal.org/project/redirect
https://www.drupal.org/project/eu_cookie_compliance
https://www.drupal.org/project/structured_data
https://www.drupal.org/project/browser_push_notification
https://www.drupal.org/project/pagination_page_titles
https://www.drupal.org/project/token
https://www.drupal.org/project/facebook_pixel
The following modules I use if there are going to be non-technical content creators and editors using the site:
https://www.drupal.org/project/image_field_tokens_d8
Drupal 8 modules I am yet to try:
https://www.drupal.org/project/votingapi_widgets
https://www.drupal.org/project/likebtn
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