I really reccomend using NTlite (
https://www.ntlite.com/) if you want stripped versions of Windows NT, you can just take the official disc images for the latest builds from Microsoft & import them, then untick all the features, apps, drivers, legacy components, software, languages ect you don't want & pre-install drivers or pre-change settings and stuff, then you can either compress the installation files so they fit on a 4GB pen drive (If you remove the upgrade from inside Windows .exe's and stuff any install should fit when compressed) or leave them fully uncompressed so they install quicker on lighter CPUs. This way you can make sure you're not stripping out components you might need, while also stripping out lots of support stuff you definitely don't need.