I think if there's any argument that Trout isn't the best option going forward it has to center around the possibility that with his body shape he just doesn't age well. Up to this point, he's been historically dominant. Segura, Harper, and Machado have all been great, but nothing they've done so far has been close to Trout's success. However, if: (i) Trout's body leads to a rapid decrease in his defensive capabilities causing him to move from CF to a corner or 1B and (ii) this decrease in defensive value coincides with a decrease in his baserunning ability, then I think you can start to look at the other guys. But given the way he hits, I think even an average fielding LF version of Mike Trout is the pick to make here, although it's not entirely clear. I am thrilled with Segura because he's a Brewer, but I need to see him sustain his power for a bit longer. His walk rate leaves a lot to be desired, although I see no reason he can't get on base at a .340-.350 clip given that he's fast and keeps the ball on the ground for the most part, so he should be able to consistently carry an average around .300. He's a very nice piece, but I just need to see him sustain this power for a bit longer before I lump him in with Trout, Harper, and Machado.