BisonTech

This plugin replace WP default admin/login/register page. 
The technique used is pretty brutal but the best currently possible, the plugin replaces the modified files automatically. 
To make the plugin run the web server must be able to write to the wp-admin directory. 
more info @ http://www.bisontech.net

LogoReplacer

This plugin replace WP default admin/login/register page.

Meera

ShapeArt is a Gutenberg block. It allows content writters to insert customizable graphics in document. 
Use this block to generate headshots with blob background for your resume.
You can select from pre-defined shapes and customize it to suit your needs. 
You can customize attributes such as content, background color and size.
This is our mantra – 
“For complex graphical needs, hire a pro graphic designer. 
For simple graphical need, use ShapeArt!”
Major features in ShapeArt include:
<ul>
<li>Easier for non-designers to use. Most of the graphic is prebaked – you can personalize it to suit your need. </li>
<li>Generates SVG output, that means the image can be scaled up and down without loss of resolution.</li>
<li>Light weight – it will not add blot to your page.</li>
</ul>
<iframe class="youtube-player" width="640" height="360" src="https://www.youtube.com/embed/XC1xd7LLDZw?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation"></iframe>

AskTeamMate ShapeArt

ShapeArt is a Gutenberg block to draw customizable shapes.

LogoReplacer vs AskTeamMate ShapeArt