I see where Diplo is coming from, but Zedd isn't really... well... the best way I know how to put it is that Zedd isn't David Guetta and I mean that's so evident by his album tracklistings as well as the actual songs he puts on his albums.
I don't really find Zedd all that great outside of Clarity, kind of the Selena track too and then, of course, his stuff with Ariana, Gaga, etc., but he doesn't scream sellout to me bc if he really wanted my coins and the coins of others, he'd jump in the Guetta lane.