Marvel: Invulnerability

Cain Marko (Juggernaut)
With his force field active, Juggernaut is virtually invulnerable to all forms of physical injury. Although he is able to be harmed by high levels of mental attack, mystical attacks or weapons with mystical properties. When Juggernaut's force field was negated by Thor's hammer, he was still durable enough to exchange blows with Thor.

Kubark (Kid Gladiator)
Kid Gladiator's bodily tissues are much tougher and far more resistant to physical injury than those of human beings. He can withstand high caliber bullets, survive in space unaided, powerful concussive blasts, falls from tremendous heights, and blows from powerful superhumans sustaining injury. Kid Gladiator is also highly resistant to extreme temperatures, particularly intense heat. The level of his durability depends on his confidence.

Paul Provenzano (Omerta)
Omerta was virtually invulnerable, although he was proved to be possibly hurt, as Northstar was able to make his nose bleed, using his super speed to punch him. He was also vulnerable to poisonous gas, and possibly to other poisons. He was even immune to Magneto's attempt to manipulate the iron within his own blood.