Greet guests with a lineup of these lighted hosts on your stoop or porch. Light with candles, battery-operated candles, electric Christmas lights.
Or use a drill and hot knife like on this one (who doesn’t like Tinkerbell?)
Or fill with dry ice like this one.
Or “carve” artificial foam pumpkins as jack-o’-lanterns or dioramas.
Or paint pumpkins if you don’t want to carve one. Or decorate a glam pumpkin with lots of bling. Some ideas here: https://www.bhg.com/halloween/pumpkin-decorating/easy-no-carve-halloween-pumpkins/