Biggest disappointments (players)

I’ve been wondering who is your biggest disappointment a player who started with us who had all the potential to be a club great but didn’t kick on.

Who comes to mind is Corey Paterson or Daniel Tolar, even Con Mika all highly touted but didn’t really kick on to the rep seen or consistent first grade. Another I reckon we didn’t get to see the absolute best of was Milton Thaiday