Which character famously proposes multiple times throughout the series?

Ross

Who was punished with endlessly pushing a boulder uphill? Which prophet was commanded to lie on his side for many days as a sign? Which mammal has an elongated snout with sticky saliva, particularly well-adapted for eating ants? In darts, what is the highest possible checkout in a single round? In Iceland, which creatures visit children in the 13 days leading to Christmas, leaving gifts or potatoes in their shoes?