With Messi and Ronaldo, Haaland cannot be compared. Haaland is a FW and his job is to score goals. It works wonders in the forward end and does its job properly. Messi, on the other hand, was playing as a freelancer and was doing great offensively. So did Ronaldo. They have also appeared to play the main role on the wings, but Haaland cannot play the main role on the wings. His job is to score goals at the forward end. Maybe it's fair to compare him to Lewandowski or Thierry Henry. Henry even played on the wings from time to time.
Maybe comparing between players is not very appropriate, because these players have different characteristics and also as you mentioned different playing positions so that they give different results, also which club they play for is very decisive.
Haaland still has a very long career at the age of 22, he can achieve many achievements when he remains consistent, and also when he can correctly choose the club where he will have a career, because it is possible that Haaland will look for other clubs and not only in the English Premier League to get more.