As far as lightgsabres cutting through the Marvel team, they cut with intense heat, right? I assume this because they melt (most) metals and they cauterize wounds instantly when someone has as body part sliced off.
So it stands to reason that characters that can withstand (very) high levels of heat, would be lightsabre resistance or outright proof.
Wolverine/Deathstrike: Adamantium is said to be to be virtually indestructible in the films, I believe Striker says this n X2. So it stands to reason it can withstand extrememe levels of heat as part of it's makeup. Though not conclusive. Are the lightsabre proof metals in SW resistant because of their extreme durability or?
The Thing: He takes fireballs from Johnny, might be enough, might not.
Silver Surfer: Survives the heat on entering Earth's atmosphere and Johnny's attacks, he's likely outright llightsabre proof. He could also just absorb it, possibly, as he did the missile.
Colossus: Nothing really on screen, but he's supposed to be invulnerable when transformed as per his power description. So?
The Hulks: Ang's version took a gamma bomb, lightsabre won't do shit, logically. Norton's had a fully armed gunship crash and burn into him without a scratch, probably not a big enough feat to make him sabreproof.
Johnny Torch: He can go supernova and survive, lightsabre won't do shit.
Ghost Rider: Is magical/supernatural and made in part of 'hellfire'. Stands it reason a lightsabre won't cut him.
Sue Storm: Her shields held back Johnny's supernova, she can fully protect herself (and others) from a lightsabre.
Dr. Doom: Took Johnny's supernova at ground zero, lightsabre won't cut him.
Kitty Pryde: Can go immaterial (and leave a Jedi/Sith stuck in the floor.)