I'd love to see Arcade Fire, Muse, Kings of Leon, No Doubt, Cold play or Foo Fighters as headliners (and of course Daft Punk) . For undercard - Death Cab for Cutie, Mute Math, Fitz and the Tantrums, Head and the Heart, Foals, Elle King, Hippo campus, Coin, Coleman Hell, Odesza, Django Django, Borns, Zella Day, The Wombats, Neon Trees, Big Gigantic, Cage the Ellephant, Sleigh Bells, Misterwives, Tune Yards, American Authors, A great big World, Sir Sly, The Colourists, Boy & Bear, The Griswolds, Crystal Fighters, Calvin Harris, Avicii, Aloe Blac, Passion Pit, Leagues, Robert Delong, Deltae Rae
Childish gambino, g eazy, nas, j cole, post malone, partybextdoor, zhu, zedd, detty wap, french Montana, jeremih, gta, lil Durk, travis scott, YG, rae sremmurd, trey songz, wiz khalifa, calvin harris, avicii,, kayne west, The 1975, lana del rey, steve aoki, frank ocean
It would be amazing if Arcade Fire was there. But other than that I would very much want Cage the Elephant, CHVRCHES, Kanye West (if this happened, that would be insane), Lorde (she is working on her new album), Macklemore (almost done his new album), Mother Mother , Mumford and Sons (released their album this year and the live performance is great), The National, Phoenix. If it was possible to bring someone again from this year then please get Run the Jewels (new album coming out next year) and Twenty One Pilots.
Osheaga's done a great job of putting together outstanding line-ups (loved the Black Keys this year!). Some great bands with recent or upcoming album releases include Silversun Pickups, Half Moon Run, Chvrches, New Order, Awolnation, Borns, Wild Child, Daughter and The Hunts so perhaps they would be good fits. I think Local Natives and Vampire Weekend have upcoming albums in the works too