Robin

Allows the author/user to upload gravatar/photo/profile image directly from the user dashboard to display on their blog post. 
Using the plugin you would not need to upload your photo on gravatar and directly upload it in your dashboard and the plugin codes add a code to display 
the photo on author blog post.
<h3>Changelog 1.1</h3>
<ul>
<li>Tested with latest WordPress Version.</li>
</ul>
<h3>Functionality</h3>
<ol>
<li>Allows you to directly add author photo through dashboard</li>
<li>No need to add any code on blog post, plugin automatically adds the photo on blog post.</li>
</ol>

Author Profiler

Allows the author/user to upload gravatar/photo/profile image directly from the user dashbaord to display on their blog post.

Marcus (aka @msykes)

Marcus

Pixelite

This is a very simple and lightweight plugin that anonymizes default avatars and prevents the user’s gravatar being automatically obtained from gravatar.com based on their registered email. This would be useful for sites where users require an extra layer of privacy, or if you just want to prevent potentially silly or embarrasing avatar accidents.
If you’re using Identicons or any other generated default avatar, the user should keep a consistent avatar unless they change their registered email.
You can also disable Gravatar completely and choose a default image to display.
This plugin is also compatible with other avatar customization plugins such as <a href="https://wordpress.org/plugins/avatar-manager/" rel="ugc">Avatar Manager</a>, <a href="https://wordpress.org/plugins/buddypress/" rel="ugc">BuddyPress</a> or <a href="https://wordpress.org/plugins/add-new-default-avatar/" rel="ugc">Add New Default Avatar</a>, since this plugin specifically prevents the gravatar of a specific user email being used and reverts to the default or user-defined avatar.
Important 3.0 Update – BuddyPress users should visit the Settings > Discussion page on your dashboard and choose one of the Disable Gravatar options to restore previous behavior.
If you have any issues or suggestions, please visit our <a href="https://wordpress.org/support/plugin/disable-user-gravatar" rel="ugc">support forums</a>.
If you find this plugin useful and would like to say thanks, please leave us a <a href="https://wordpress.org/support/view/plugin-reviews/disable-user-gravatar?filter=5" rel="ugc">5 star review</a>!

Disable User Gravatar

The plugin is a must-have for each WordPress installation. One can't process the email of the user (personal information) to create a hash and sent it to a remote server without consent of the user.

Must-have

Stops WordPress from grabbing a user avatar using their registrated email from gravatar.com.

Author Profiler vs Disable User Gravatar