Hi, have you considered using an actual Piano emulation plugin? At the time when this song was made, Avicii used FL Studio (and for a long time after that track as well, but I think he uses Logic Pro now), so he might as well have used the FL Keys rompler-plugin, which can deliver that hard and bright tone very well. But then you do of course have lots of great emulation presets in different synths...
Zukatoku - Mod Scientist