I'll link the ones from WaPo, just throw a quick google to see what happened with those articles. If you want to see them in their original state you should be able to find an archive to find the actual text at a given date.
1. Electric company shenanigans
2. Russia propaganda list
3. Confrontation between Bannon and Kelly
4. State dept. resignations
Pretty sure there are some more if i keep looking around. If you're curious about what went on with those searching for something like "Washington post [Article Name] [Retract/Fake/Mislead/etc.]" will throw plenty of results. Not familiar with what media sources people consider trustworthy but I've seen quite a few for these. Feel free to pick your own.
Also, to find more like this it should be sufficient to google for "Washington post [retracts/backtracks/corrects/fake]" and then go through the results. A lot of duplicates but if you go to some of the later pages of results you should find some older ones as well.