I found a semi vanilla PvP server that is inspired by StrengthSMP. The big idea is that you get a strength boost when you kill people so fights keep getting crazier.
If you drop all the way to -10 strength you get eliminated and banned. There is also a revive beacon so other players can bring you back and unban you.
It has a custom spawn and a custom nether portal setup. The worldborder is huge at 100k by 100k. They also say they can run fun events when there are enough players and the launch is planned for 30.01 if the player count is high enough.
The server is hosted with 24GB of ram and an 8 core 16 thread CPU at 4.60 GHz.
Strength PvP SMP With Revives

Deadly Hardcore One Life Semi Anarchy

Deadly Hardcore One Life SMP

Deadly Hardcore One Life Semi Anarchy

Mrowcraft Chill Survival Zone

Mrowcraft
Mrowcraft is a chill, pure vanilla survival server. It has a huge world border, few rules, and no pay-to-win stuff. If you want that old-school SMP vibe (raw, simple, and wide open), this is the place for you.
Build, explore, and survive at your own pace in a fresh 1.21.8 world. No ranks, no money stuff, no fuss. Just Minecraft how it was meant to be, with space to make your mark.
together-games.gl.joinmc.link
Iron-Anarchy Chaos Realm

Iron-Anarchy
Welcome to our Anarchy Server! Here, freedom and fun meet! With a huge 1.6 million block world, there is so much space to roam, build, and break rules.
Hacking is cool here, just like doing what you want. No rules, just pure chaos!Our team is friendly and here to help. We have a strong, close-knit group where everyone can shine and be free.
Join the fun and make your mark in this wild world!ironanarchy.lol

