Halloween // Need easy costume ideas

My partner and I are going to a Halloween party but he’s really picky about what he wears: * he’s a bigger guy so can’t really get his costume from spirit of Halloween because the one by us only goes up to an close * he gets hot really easily so usually just sticks to tshirts

Ideally I’m looking for couples costumes but honestly he’s been shooting down all my ideas so far so I’m not firm on that