I use this site to turn things into tokens - https://rolladvantage.com/tokenstamp/
It takes whatever image you plop into it, so at that point you can turn anything you want into a token. As far as what to make the images with, I’m not entirely sure, since the ask is kinda vague. What are you looking for in the tokens?
Iirc, community banners are 960px x 240px