Mainstream news probably NOS as it is the state news. Regional state news like Omroep Brabant covers provincial news. I’d say for mainstream news they are the most trustworthy at least.

For more investigative or left wing news I’d say stuff like De Marker, Groene Amsterdammer, Left Laser, Linksinhetnieuws (instagram), MiGreat (insta), Follow The Money.

I just came back from living abroad for years so I also have to look for more news sources.