When it comes to "First to the Show" from this class (as long as he stays healthy) I'm gonna go with Logan Turner. Has a howitzer for an arm, is supposed to be excellent at handling a staff, has played against a high-level of competition in college, LH-hitting catcher who has some power.
The hit tool is considered pretty iffy (but what backup catcher's in MBL isn't) There is some hope he can improve somewhat with work on his swing. If not Tanner, could be one of the college arms if they decide to put them on a bullpen path.