I am tempted to say Hawkeye, but considering that he didn't appear in Infinity War and Thanos won, ad then reappeared in Endgame and the Avengers won, so he basically is the Avenger's plot armour, I honestly don't know.
Hawkeye is not weak.
Which one is stronger, the guy that rents a jet pack from the military or the guy with peak human condition and master aim?
They all strong in their own way
What do you think?