Left to right: Coco, Mckenzie (retired), Alicia C. Moon
Coco has to my knowledge only done fetish modeling, hasn't used a last name (making her content hard to search for), and only has 1 G/G HC film that I've seen. She has some weirder fetish videos earlier in her career where a guy rubs his dick on her while she's pretending to be unconscious, but no penetration.
Mckenzie is strictly zero HC that I've seen.
Alicia has some vanilla amateur partner HC that's easy to find and one recent super heroine HC film.
Best producers making hardcore: SHL, GIGA (asian and censored), Primal (good stuff, but somewhat low budget production), Lucia (very limited HC films), TBFE (even more limited HC films), PKF (also contains snuff), PST/PTF Psycho Thrillers (also contains snuff), Superheroineworld/Prostylefantasies.
Then you'd have more niche/independent producers with more mixed bag quality like Evangelion von Winter, Tropic City Heroines, Christina Carter, Sinn Sage, Provillain, Cory Chase, etc.
Of those, I think I ranked the first list in order of a combination of production quality and focus on hardcore. If censorship is a dealbreaker, avoid GIGA, but they make some really good films.
As far as actresses with good hardcore super heroine films: Ashley Lane has at least one with I think every single western producer lol, she's sort of the icon. Other than that, there's a bunch that's going to come down to personal taste. If you find some you like, people can probably help you find more.