I never saw the list, but for me top 3 would be 1.-Alien&Predator, 2.-spiderlike aliens from start troopers / species 8472 from Star Trek, 3.-I like those aliens from indenpendence day with will smith. I know aliens from Star Trek Voyager...They are similar hunters like Predators. Don't remember the name, but I know that they are tophy-hunters like Predators