Mogwai, Sharon Van Etten and Father John Misty would suit me well! Gillian Welch as a Garden stage headliner would be lovely, maybe Adrianne Lenker too
Korn announced some solo shows with Rock am Ring/Rock im Park so I guess we're getting closer and closer to their announcement. If Korn are not the remaining headliner (would make sense if they want to differentiate themselves from NovaRock) then I don't see that many possible names. I'm just hoping Friday will be super weak so I can do a little side quest - Outbreak in London 👀