If you want a song with all majors, where the full chords are played on the main instrument, first thing that comes to mind is Eno's Golden Hours (https://www.youtube.com/watch?v=Sxyg3sP03Cs). For parts of songs, maybe the intro to Wuthering Heights by Kate Bush (https://www.youtube.com/watch?v=-1pMMIe4hb4)