Unfortunately you have listed the major players in that space. Sounds like what you need is to run a personal dedicated server.
I know $$$ is an issue for some / most but you can get older computers on eBay and use that as a dedicated server. You don't need latest hardware to run a dedicated server. I know this is not the type of answer you were looking for but it sounds like it fits your needs better than the answer you were seeking.
For example I bought a old "HP Z420" for around $300.
Specs:
CPU - Xeon E5-2680 v2 @ 2.80GHz, 10 Cores, 20 Logical
RAM - 64 GB DDR3
OS - Microsoft Windows 10 Pro
HDD - 1 TB 5400 rpm (upgraded to SSD for better performance. Highly recommend this step)
I have ran Avorian, Conan Exiles, Satisfactory, Valheim, Necesse, Rust, and Ark Survival Evolved. Often with 2 server instances running at the same time without issues.
If you do decide to go this route make sure you have the upload speeds to support the amount of players that are going to be connecting to server.
For example, Steam recommends at least 1140 kbps for a Half-Life Dedicated Server instance with 32 players. For more modern games, the requirements may be higher. Minecraft recommends at least 15 Mbps for a game server with more than nine players.