GOOMB SMP is a vanilla survival server with an amplified world and it feels really active and close.
The world was reset only a few weeks ago so everyone is still building up their bases. There is a 6k by 6k world border so people end up building near each other or together which makes the server feel more alive.
The Discord is super busy with people advertising shops sharing screenshots of the crazy terrain and talking about trades and deals. Voice chats are usually full of players hanging out and planning what to build next.
The rules are pretty strict about being respectful. There is no racism no hate speech no NSFW stuff and people are asked to keep things drama free. Griefing stealing and unconsented PvP are not allowed so builds feel safe.
To join you apply first then the mods look at it and if you are accepted you get whitelisted. It feels like a community that actually cares about who joins and wants the world to last a long time.
