Many indie documentary companies are edgy. Just look at what plays at festivals like 'hotdocs'. Speaking more generally about journalism you can try The Interc

Many indie documentary companies are edgy. Just look at what plays at festivals like 'hotdocs'. Speaking more generally about journalism you can try The Intercept. But if you want more established sources where you have to dig for edgy content you can try New York Times, Reuters, Washington Post, NPR, PBS Frontline, BBC, CBC Radio, ProPublica, Associated Press and The Guardian.