Banner is pretty insane in The Immortal Hulk #8 - His Hideous Heart.
Banner was completely dissected with an adamantium scalpel mounted on a hydraulic arm.
Then snapped his finger to get out!
(while his flesh, bones and organs were separated...)
Regenerated in mere seconds (while having a snack lol).
Crazy huh? I KNOW~!
Deadpool can heal insanely fast as well. Please enlighten me :)