There are a lot of great Marvel superhero costumes, but I think the best one is Scarlet Witch. The scenes where she gets her final costume in WandaVision will always give me chills because she really comes into her own. You could argue that she is not really a superhero in that moment, but I will defend her to the end as she was just doing what she could to save her family. Her suit looks incredible with the cowl and the cape.
