Head shot

Hello, I was just working on an Ironhide bash, and was trying to figure out what head would best suit him. In trying to determine what makes Ironhide himself I realized that he's got this John Wayne Gunho Attitude, some football player type size, and a trojan footsolder helmut. Way I see it, he needs to have a heavy jaw line. Anyways, I can't figure out what toy part best goes with this (looking for something the size of alt. Silverstreaker, but with a heavier jaw), but here's my sketch of Ironhides head.

