Well the double muzios gambit trumps every one of those, saccing two pieces.
I wouldn't call an opening "king" just because it's agressive. If you want a "king", look towards sounder options like the marshall gambit & yugoslav attack.
I like the Ruy Lopez exchange variation for highly agressive play. Of course I am not what I consider a Highly agressive player. I have read a lot about the halloween gambit, but as with all true gambits you are trading a weakness for a strength.
According to u which is the most aggressive opening ? the kings gambit , the fried liver attack , the halloween gambit , or some opening u guys know