I don't remember him almost overpowering Star Platinum. If that ever happens, Jotaro's jobbing.
Star Platinum is THE strongest Stand.
But seriously compare the power to turn things back to unbroken verses...hell, almost anyone else. Kira had fucking bombs, Okuyasu could make anything he touches disappear, hell, even Koichi's Echoes were far better in terms of sheer battle prowess.
Josuke's power required a ton more thinking to be awesome battlewise.