The "headless horseman" from "The Legend of Sleepy Hollow"* usually had a pumpkin for a head...... google for " headless horseman" and you may get some ideas or go to a craft store like Michaels or JoAnns. They have plenty of small pumpkins left over from the Thanksgiving decorations you can mount on a runner figure.....

*It ISN'T just a legend! He rides up here every year! 8-O