I packaged 3proxy a long time ago. It was working fine, but I eventually didn't need it anymore, so it has been unmaintained. It might need some love since many things changed in Cloudron (probably a better way to do healthchecks), but it will likely be easy to update to the latest version and make it work. It could do both, http and socks5: https://git.cloudron.io/msbt/3proxy-app
