Shouldn't he know which is a better fit for what he wants to do as well?
Honestly, maybe it's too close a call for him to even make — but if he likes Zach better, I think Zach's risen enough in the conversations lately to be taken seriously as a potential #1. Certainly by informed fans.
I think he's got plenty of special sauce for a HC & GM to sell him as their dark-horse choice for #1 — to a rabid fanbase.
For starters, I think he's got the best overall arm in the draft. I'd also be quick to point out he isn't fully grown yet, like the other two.