I just rewatched Ragnarok last night. It occurred to me Val might be the top fighter in the MCU Women's Division.
**EDIT: Melee fights, only with standard weapons such as swords and daggers.**
For the sake of the thread, let's omit Hela from consideration since she is in a class all her own as a demi-god.
Does Val have the best feats? Does she outshine Gamora, Nebula, and Sif in one on one fights? I'm pretty sure she can out-drink them, but these 4 seem to be well-matched in other areas.
Strength, fighting skills, agility, durability, etc. are the obvious criteria.
Black Widow is one of the best CB fighters on the silver screen, but she's human and lacks the super strength and durability that the others do. She'd be killed with one well-placed punch. Same with Agent May, Mockingbird, and even Quake.