The Config-Ref
Below given is a curated list of awesome bspwm configs for ready reference, cloning and experimentation. We do not advice you to blindly copy configs, instead read them and try writing them by your own. But it is up to you whether to use bspwm or build upon bspwm.
These are some nice configurations that beginners should try learning and configuring.
These configs are configured by various people as per their system requirements. You may run into issues if some scripts are not compactible or optimised for your system, or if you are missing some dependencies. Doc741 does not rank based on popularity, it is alphabetical order. No offense.
Best Configurations
1) Archcraft-Bspwm
Desc : This is a very asthetic and beautiful bspwm configuration hand crafted personally for Archcraft OS by adi1090x. Has rich polybar and rofi ecosystem.
Gallery :

2) Gh0stzk-Dotfiles
Desc : These dotfiles are designed with the goal of providing a bspwm environment that is lightweight, efficient, and functional, tailored for any use. Has rich theming system, about 18 prebuilt themes. [This is original text] from gh0stzk.
Gallery :

How to get yours here
Make a pull request to the repository linking your bspwm dotfile repository with description. If you have a very good documentation and configuration for bspwm with a nice asthetic, your bspwm configuration can mean a lot to others. It will be added to the list.