I don't have any more ideas for now so this is the rest of my creations. They all look the best in the night mode.
For example I made a very small banner that you can add to your posts to persuade the users to vote for 
Also if you don't like the typical < hr > line you can use one of these images instead. One is a little bit smaller than the other.
I made one more LeoFinance witness banner.
At last I created this.
I kind of like it.
Anyways, if you are looking for any custom graphics just contact me.
Thanks!