Ranked in severity:
Hall Staker
Solomon Ling
Gaff Brayshaw
Cameron Andrews
Houli Lamb
Vickery Cox
If you are looking at damage wise
Gaff Brayshaw (eating through a straw for 4 weeks)
Cameron Andrews (brain bleeding, not immediately evident though)
Vickery Cox (I think he had 2 weeks off)
Hall Staker (he played a week later)
Solomon Ling (Played 2 weeks later)
Houli Lamb (he played 2 weeks later?)
AFL has proven time and time again that the damage determines the punishment