Davis is a given, but I really like Thomas Robinson. I'm not sure you can call him a big, considering he's 6"8. But he and DeMarcus Cousins are going to do big things in Sacramento(or wherever the Kings end up).
As for sleepers, I like Andrew Nicholson. I really wanted him in this draft because I could see him becoming a Luis Scola-type guy. He's got incredible footwork, great range, and pretty got size(6"9, 250). Orlando should start him and have Big Baby play the role he plays best, the sixth man.
I will be rooting for Sully and Fab, of course, but they won't be in rookie of the year voting. I could see Sully making the Rookie Second Team, though.