SNES shooters.... Ummm........ well, Axelay is the only good one that comes to mind. Ah wait, Area 88 was decent fun. I'm sure there's few other worthy ones, but Tatsujin says, shooters weren't the SNES's strength.
For that era, Genesis had my favorite shooters (TF series and Gaiares), though the TG16 certainly wasn't short on em either.