Medrano was already pretty solid last year. In my opinion, he maintained his play. On the other hand, I believe Gonzalo is an obvious choice. He doesn't have the power, but he's become a great play in the Dania earlies. Garita has also become a better backcourter this year, although he's been injured the past few months.
I also like Zulaika, but it's too early to bring him into the conversation. He'll probably be the answer to this question in upcoming years.