Wasp's was accurate. He offensive power is low.
Hawkeye may be the best bowman on Earth but he's still just a normal human in very good shape.
Black Panther has fighting skills and access to high tech stuff/vibranium. Medium seems right.
Cap, medium, yeah, since he's a super soldier. His offensive power is brute force, and other Avengers outdo him there.
Iron Man, high...when he's in newer armor.
Hulk EXTREME...can't go higher.
We never got Thor or Ant-Man's assessments. I'd say Thor's is high and Ant-Man is medium...(Giant-Man's efforts seems to underwhelm despite his size)