Check out Hydra attacking 3D model on CGTrader for $10. High-quality Polygon mesh mesh by buncic: 5100000 polys, 2700000 vertices.
ZTL (Zbrush, filesize: 166 MB), OBJ (OBJ, filesize: 156 MB), 3MF (3D Manufacturing File, filesize: 176 MB), STL (Stereolithography, filesize: 266 MB)