1st 3 maybe ? They are miles ahead !
Yes, those first three are undoubtedly currently better keepers than Pickford.
However, when it comes to assessing how good our purchase is (accepting that he is only 23) it's important to look at his performance relative to the best keepers when they were new. Of those three, De Gea was pretty shaky to start with, before improving behind a good defence to become the best in the league. Lloris was all over the place, and in and out of the Spurs team for a fair while before stepping up a gear (his improvement which occurred at the same time as Spurs defence improved drastically). Courtois was outstanding in his first season, although he did come in from a brilliant season at a top team the year before, and into a dominant Chelsea team with a great defence. His second season he was at times terrible.
Now Jordan hasn't been perfect by any stretch. But he has made game changing saves. He has shown several characteristics that you cannot teach a keeper. Given his age, and the constant pressure he is under in our current team, he will be learning and should hopefully overcome his current deficiencies.
Ultimately the keeper isn't the position that wins us the game. The rest of the team has to get into a position. Where a brilliant save means 1-0 or 2-1 or 3-2. So far, in most games, we've been needing him to prevent us going several goals behind, and he's done fairly well as a one man defence, in the toughest league in the world, against some of the best teams in football. For a young lad new to a club with a shit defence, like.