Wilson seems to me the closest to come through, I am unsure on Brewster because I have never seen him play and secondly he just came back from a serious injury. I have no doubt about Gomez, he is a quality defender. As for the others, I am unsure, Woodburn is still really inexperienced and I feel like it's too big of a step for him and as for Grujic, he didn't really impress me when he played and looked average.
Agree regarding Woodburn, same as you, i haven't watched Brewster but we'll find out in the pre-season. Wilson looks the most ready but we already have 2 players in his position, ie, left footed playing on the right, Salah and Shaq. As Klopp doesn't seem too fond of Shaq who seldom plays, maybe we should sell him and bring Wilson back, but, I don't know how Klopp rates him. That would allow to get some funds for another position as well