this might be a little off from what your ask but the mc is a S class restorer. the genre is like psychological/action/mild horror (there's some zombies) so idk if that's what u want. I just started it so not positive how good it is but looks promising:
https://www.mangago.zone/read-manga/a_trace_of_the_wonder/
reading this one next and it looks like the mc has some kind of white/light magic (maybe??) so I'll add it here: https://www.mangago.zone/read-manga/i_can_see_your_stats/
Thank you! I don't mind horror stuff, I even welcome them with open arms! (๑•ㅂ•)و✧
MC can be transmigrated to another world, reincarnated, or just in a fantasy settings, even a gamer as long as he is a healer or some sort, or just his powers are related to white magic, like regeneration, shields, buff, he can even be an alchemist specializing in restoration or anything related to white magic stuff