Wow this is tough. If we NEVER execute anyone, then for sure the werewolves will win. If we DO execute someone, well, we either eliminate a werewolf or we hasten the demise of the village... but at least there is the option of a positive outcome. Guaranteed though we will lose a villager a night. (unless the medic saves the right person but gosh that seems like a tough job).
This is hard. Lots of second guessing, but I will go ahead and second the nomination to execute Aerox