Which mods have you tried so far ? the most endorsed mods are often the oldest ones and thus have been created back in the days, before they were any modding tools available. In other terms, they won't be available for the nexus mod manager. There are also plenty of "Mods" which are Reshade presets, and should really not be called mods (even though, worth using) .
Try
this mod, it's compatible with NMM and it's probably one of the best textures mod out there. :