The team making the pick. Which player do they think will be the best.
Listen if they got to pick 1st, and they believe say Mesa for example is the best player, then take him, I don't have an issue with that if that is what they believe to be true.
But if Schaefer is the best player in their opinion, and they have a chance to take him, than that is the correct course of action. There is no need to overthink this to grab an additional asset like a 2nd or 3rd rounder, or focus on a perceived positional need (and I say perceived because I don't believe center is anywhere near the positional need for this organization that other people do).