Jacket, Cuirass, Haubergeon and Harness, all have shoulder pads. Only Haubergeon has shoulder pads early, the others are on higher-tier material made than the current (except for a few Unique piece), for instance Cuirass will have shoulder pads from Steel-tier and up, Jacket from Antelope Leather and up etc.

Some Cuirass (I think Dark-Steel made) have Leopard/Hyena Leather Shoulder pads.