Interesting question. I'd have to say "no one." We're basically at a blank slate at this point, which I don't think is necessarily a bad thing, being at ground zero of a rebuild. Let's see who makes this team theirs next season.
I think that's exactly the way we should be looking at things.
The "new core" will self identify itself... hopefully, we'll start to see some players emerge next season... but I suspect it will take a bit longer.
Right now, among the youth, I think all we can do is point to players we like and hope they develop into core pieces.