I gone through a lot of hosting service providers and unfortunetly cannot find a single one that can be used without running nonfree programs, all of them require loading bulky obfuscated JavaScript apps.
I know of Codeberg Pages for static sites for example, but it is not suitable for any business or professional use.
I don’t think you know what you mean/want. I never had any registrar requiring me to install anything to have my domain registered with them. The same is true about hosters too.