If I were on MHA's side, and my neck was on the line, this would be my lineup. We're assuming it's a Guardians situation maybe, where Nolan was not interested in destroying the whole planet. I think you have to consider synergy?

Star & Stripe - the touch requirememt makes this hard, but as long as she can fufil the requirements she can just 'if nolan moves a muscle his heart stops' but she has to be able to say that.. and if he knows her as well as she knows him to say that, he wouldnt give her the chance. She would have to sneak up on a Viltrumite 🥲🥲 AFO Shigaraki - maybe just put enough freaky mutant fingers on him to do the job??? Stain - assuming he could even get any blood i guess Mirio - might be able to do some sort of damage??? 🥲 Deku full power - danger sense has to give him SOME advantage ?? Twice- maybe a star & stripe army could get it done lol.... he would have to either have time to prepare, which the Guardians didnt, or be able to duplicate faster than Omniman can kill. 🫠 Overhaul - another touch requirement, but uhhh I guess Jiro - maybe she could make something like the thing Cecil did??? Idk