These Materials are part of my procedural materials exercise with Substance Designer. It includes generators too so you can make a lot of variations of some materials.
You can use the SBSAR with Substance Player(FREE) to export uncompressed textures up to 8k.
99 PBR Materials
Include Diffuse/Base Color, Roughness, Normal, Height
Blender 2.8+ file
SBS and SBSAR (Substance Designer 2020.2)
Generators for some Materials