Vincent Dubroeucq

Visit your blog posts listing page, or a single post page, and open up the WordPress customizer.
Under Tiny Thumbnail Settings, choose or upload your default image. That’s it !
Enjoy !

Tiny Default Thumbnail

Allows you to add a default featured image to posts. Just add a default image in your customizer settings !

Kudratullah

Niamul

AbsolutePlugins

With Absolute Thumbnail Column you can upload, select or change post thumbnail (Aka Featured Image) with ease. No need to edit your page/post only just to change the thumbnail. It supports post types that have thumbnail supports.
Absolute Thumbnail Column is fully compatible with WooCommerce, integrates nicely with Image Column, and enabling uploading, selecting or changing product thumbnail from the list-table itself, saving a lot of time.
Absolute Thumbnail Column uses the native WordPress media popup, ensuring the security and integrity of core features of the media library.
<h3>Features</h3>
<ol>
<li>Unlimited Usages.</li>
<li>Supports all post type that has <code>thumbnail</code> support.</li>
<li>Builtin WooCommerce support.</li>
<li>Uses the native WordPress media popup.</li>
</ol>

Absolute Thumbnail Column

Absolute Thumbnail column allows you to upload, select and change thumbnail on any post-types right from the post table.

Tiny Default Thumbnail vs Absolute Thumbnail Column