Web Guy

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Simply activate this plugin to attach featured images to their respective posts in the site feed: https://example.com/feed/. One example of why this is useful is for providing an image for social media sharing through services like Dlvr.it, Hootsuite, HubSpot, etc.

RSS Image

Simply activate this plugin to attach featured images to their respective posts in the site feed.

Martin Lormes

Automagically adds Open Graph tags to your blog. Control how your posts and pages are presented on Facebook and other social media sites. No configuration needed.
When someone likes or shares your blog on Facebook, your header image is shown. If someone likes or shares a post, the featured image (post thumbnail) is shown. If you haven’t selected a featured image, then the plugin looks for the first image inside the post. If there aren’t any images in your post, then your blog’s header image is shown.
For more information on the Open Graph protocol go to http://ogp.me/

Open Graph Pro

Adds Open Graph tags to your blog. Control how your posts and pages are presented on Facebook and other social media sites. No configuration needed.

RSS Image vs Open Graph Pro