If you want lightweight Bash script tool for setup WordPress servers there is only few ones with strong features and maintenance like:
- CentminMod
- SlickStack
- EasyEngine (now Docker if using after v4 versions)
- Webinoly (copy EasyEngine v3)
- WordOps (fork of EasyEngine v3)
- VPSSIM
- HocVPS
But Centminmod, VPSSIM, and HocVPS are more general and not WordPress focus. Actually, Webinoly also focus little bit on static sites too, etc.
SlickStack, WordOps maybe the easy ones currently for advanced user who is not expert about programming and Linux etc.
And some of them also including WP-CLI also for some easy WordPress CLI commands if you want (but not necessary to use it too).
GUI is really overrated and actually will make more security problems, bloated code, etc. Its very easy to learn basic Bash commands after study for few days only.
If you really must keep the UI and want like cPanel copycat, well its not lightweight but some options:
- cPanel
- Plesk
- Virtualmin
- VestaCP
- Webmin
- ISPconfig
- Cloudmin
- Directadmin
- CentOS web panel (CWP)
- etc
There are so so many UI for shared hosting (shared server) control panels now. But many security risks and you must take carefully about that.
Learn a few Bash commands and you will have faster, lighter, safer web server... easier to setup, easier to migrate, etc.