If you are at all serious about security you don't consider Windows.

Depending on how serious you are you also don't consider MacOS.

And then you kinda have a couple of things to chose from but ultimately you need to build your own security depending on your attack/threat model

And then depending on how "serious" you are you also don't consider Linux.

But also, threat models and the best way to mitigate them aren't really a linear scale of being <unserious> to <serious>, but a complex consideration of a particular situation.