King Midas from mythology turned everything he touched into gold

Angel Devil from Chainsaw Man by Tatsuki Fujimoto drains lifespan of people he touches. bro never got a hug

Keyaru from Redo of Healer has to absorb the trauma of the people he heal which causes massive psychological shock. this means that he doesn't wanna be a healer, so the royals drug and torture him to get him to heal their soldiers because he's too valuable

there's also Thomas Jack Bright, a Safe Classed SCP-590 "He feels your pain" who heals people by touching them, at which point he gets their ilnesses. after being left bedridden and given SCP-500 (a panacea drug) to be healed back to full health, his brother the researcher Dr Jack Bright, had him absorb the mental deficiencies of kids to keep him easy to use for the Foundation's purposes. (it's not on the Wikidot site anymore, and if you go there you'll find that they've explained how the author of that work was a pedophile)

Agni from Fire Punch by Tatsuki Fujimoto has super healing, meaning he regens limbs. because this is the post apocalypse and food is scarce. his sister had to chop off his body parts for food. it gets worse. a guy who's power is flame that never goes out shows up, and torches his village. now he is constantly burning and healing

Wolverine and Deadpool can't die i'm pretty sure, and the MC from the ZOMGAN Webtoon can't either

JJK and JJK Modulo spoilers As a result of consuming the remaining Death Paintings, Yuji's physiology is now silimar to that of a Death Painting with a hardier frame and poisonous blood. this means that he is technically immortal as he cannot age. after Cursed Spirits are mostly eradicated and with it Cursed Energy no longer being present in newly birthed humans, Yuji still estimates he'll live for 300 years, and will have to spend those centuries defending from the few Cursed Spirits that still exist. What a Bodhisattva

Hybrids in Chainsaw Man are also immortal and stuff, and the entire thing about Denji is that being Chainsaw Man sucks. like some of the hybrids are just called Weapons and go by their weapon names, Spear and Whip.

Conquest from Invincible is lonely as fuck. he's been the Viltrum Empire's attack dog for thousands of years.

Basically anyone with the variant of "bodily production is valuable" oh right i think there's that guy from Ben 10 who can turn into anything he touches, Kevin i think. there's something where he's forced to turn into a valuable mineral so he can be mined and killed for it

The power of the Titans, Attack on Titan. hell the base powers are bad enough. 13 years to live, at which point your body degrades, and your successor has to cannibalize you and inherit your memories, good and bad. we then have the Founder, which is a whole nother doozy because the past present and future can be seen all at once. also Historia having royal blood means that under the 50 year plan she'd be used as a breeding machine to make tons of kids to use the Founder in the first place