Im with gree on this.Cant say who is the greatest legion anymore than you can pick the best fighting unit in this world.Its always use the right tool for the job.And some jobs are trickier than others so take longer.Plus your top four are the big boys as far as fluff go so that'll certainly help in making them look bigger,bolder,better etc.Plus if you go fluff wise you'd have to say the luna wolves and horus, the emperor chose them,so did chaos.Neither of them picked the rest.But as gree says you cant pick the greatest legion IMO
