The fact that he's had all these #1's plus way more massive hits that never went #1 is incredible. It almost makes me kiiiii looking @ his production discography, that the songs he produced for people were always the singles from that album.
Taylor Swift 1989 so far;
Shake It Off, Blank Space, Style & Bad Blood - 4/4 by Max
Ariana Grande My Everything so far;
Problem, Break Free, Bang Bang, Love Me Harder, One Last Time - 4/5 by Max (may I add he only produced 4 songs for her and all have been singles).
Katy Perry PRISM so far;
Roar, Unconditionally, Dark Horse, Birthday, TIHWD - 5/5 by Max
Taylor Swift RED;
The biggest 3 songs (IKYWT, 22 & WANEGBT) all produced by Max
and the list goes on and on with Katy's TD/(CC), Nicki's PF:RR, Britney FF, Katy OoTB etc..
Most producers tend to do that when they've found their niche.
Pharrell, Dr Luke, DJ Mustard, etc. I do believe that Luke did try to do something different when he created International Smile, though.
True. You can tell they were channeling Daft Punk and Lynyrd Skynyrd with the vocoder and guitars. They really need to veer into that experimental, avant garde sound again.