The Marauders would be into the 90s grunge look, I can see that, yeah. The belted coat look you posted is SO uppercrust pureblood, though, that I immediately thought of Blaise Zabini (doesn't hurt that the model kind of looks like him too XD). I can see Draco Malfoy going for the grey on grey but he'd likely do them in gradations instead of one tone only?

Evyclaw