DJWS > Zedd > Madeon > RedOne >>>>> Garibay
Sorry, but Garibay is responsible for some of the messiest, noisiest, unnecessarily busy productions in her portfolio. Some of her most iconic, sure, but iconic despite their productions tbh.
DJWS did some AMAZING work on ARTPOP; his synths are magic and you will all deal. And very, very diverse talents.
At the end of the day this album is a bop and it's 70% because of him. Zedd and Madeon are fabulous as well though it's hard to compare them to Paul's work only because they only worked on two songs each (well I guess three for Zedd, if you wanna count Aura).
And I'll write up an ARTPOP review. Soon. lol