Honestly, Mike Trout. Given his popularity and talent, and the fact that we live in the era of endless parallels and inserts, not to mention checklist cards featuring players I would expect to see more Trout cards, With that said, 34 cards isn't exactly few, but I think it's fewer than I expected.
In more practical terms, I'm a little concerned that I have more than twice as many cards of Yermin Mercedes (8) than Travis d'Arnaud (3).
Collecting White Sox, Royals, and 1978 Topps Baseball. Trying to build a multi-sport HOF frankenset.
Done is better than perfect.