I recently stumbled over a discord that serves as a catalog of other Rp servers. It is VERY nice, and I'm happy to have found it. I want to share it!
What makes Grand Central different from other hubs is each server gets its own channel with a simple advertisement. Every server that submits goes through an interview process to check for quality. There's no mess. You can look for a game by category instead of scrolling and praying.
Here it is, go give it a look.