I found Stellara Servers and it is all about Minecraft server hosting that tries to stay fast and stable.
They say they focus on good performance so your server runs smooth even with mods and plugins and custom jars. It sounds like it can work for a small friend group or a bigger community.
They also talk about reliable hardware for low lag and consistent TPS. Setup is instant so you can start quick and they have a simple control panel.
If you need help they say support is responsive and you can ask about setup and modpacks and what plan makes sense for around 10 to 20 players. They are also running a first month discount code right now.
