Last season the main competition for Haaland was Harry Kane, but as far as I understand he will be playing in a different league next season... So probably Haaland will remain the top scorer in the EPL, because he scores twice as much as the others... I would like to see new strikers at other clubs, maybe then Man City will have a good opponent...
I'm not sure which striker and from which team you'd like to talk about as a potential competitor for Haaland next season, but there's definitely going to be. Haaland was unstoppable last season, but I think his form can change from season to season. I'm not sure he'll score 2x as many goals as last season, but I think his average goals scored over the course of a season will still be above 30.
So far I still believe Harry Kane will stay at Tottenham so he will remain a competitor for Haaland. If in the end Bayern Munich agrees to some of Tottenham's special demands for Kane, then I think another striker will be on the front lines for the top scorer title. Manchester United, Newcastle, Chelsea and Liverpool all have great strikers, maybe one of them will be a great competitor for Haaland.