Gotta go with Tiny, i know you could make the case for a lot of guys but IMO it all depends on what we get out of him in the post...
We need a dominant guy down there, one we can rely on to score and he is the only one with that type of ability on our roster (i know Orlando is getting better but there is no way he is ready to be dominant and a go to guy)
There are only a few other guys i would consider being keys, but not as big as what we need out of Tiny...there is more upside for the team with Tiny having a great season than anyone else IMO because there are already some knowns going in...
Here are the things we know for sure:
WW will be a dominant guard...hard for me to envision him not improving
Crocker will give us some great games, some average games, some below average games...Just doesnt have the take over instinct, will be a great veteran leader
TMG will play a lot at point and wont be asked to do too much, but i think has the capability too...even if he underperforms we have the guards to take up the slack