There’s probably no single “best” panel for XenForo. It depends on your experience level and what you prioritize.
Among the free panels I’ve personally used, I liked aaPanel the most. It’s easy to manage, has a good feature set, and I found it quite practical for running XenForo sites.
That said, I currently use DirectAdmin. It’s stable, lightweight, and well-supported. The main reason I moved away from some free panels is that I’m always a bit concerned about security and potential zero-day vulnerabilities in free control panels, especially when running production communities.
If I had to rank the ones I’ve used:
DirectAdmin > aaPanel > CloudPanel > CyberPanel
But honestly, server optimization, PHP configuration, Redis, LiteSpeed/OpenLiteSpeed, and proper caching usually have a much bigger impact on XenForo performance than the control panel itself.