Doc Samson (Marvel Legends Fin Fang Foom series)
"Though Dr. Leonard Samson originally came to the fledgling Hulkbuster program hoping to cure Bruce Banner of the curse that afflicted him, he secretly harbored a scientist's curiosity. He wanted to know what made the monster hidden inside Banner tick, and he suspected that the Hulk was more a creation of mind than of modern science. Exposing himself to gamma radiation siphoned off the Hulk, he found his theories at least partially borne out as his healthy self-image and unified psyche led to a remarkable physical change without the mental impact of other gamma-irradiation cases. Since his change, Doc Samson has dedicated his life to helping the Hulk and Bruce Banner finally live together as one mind and one body.
Includes the lower torso & upper tail of Fin Fang Foom."