Based off of that first one you posted, how about a Black Chrome helmet with a larger Gold Chrome Tiger Hawk, done in that outline style, tilted slightly forward and maybe connected around the back of the helmet, like the Seahawks logo is on theirs or almost meeting, with the head feathers dividing the two at the back.
Not for good, just as part a special uniform...paired with a shiny gold jersey with black numbers only to match the Tiger Hawk and black pants to match the helmet with a thinner gold stripe down the sides of the legs.
OR...the state of Iowa on a helmet would be cool too.