Richard Grey also went to Ludlow in 1483, as I remember it. He's got to be in there somewhere. And Surely Dorset's going to be important in his half brother's court too.
Morton?
Richard Grey will have a role in Edward's court methinks, but I have no idea if he'll be able to get a title or a marriage to a rich heiress like his older brother did (at least, not without reigniting resentment against the Wydevilles. And let's face it, Edward V's queen is Warwick's granddaughter and no shrinking violet so she'd probably lead the charge).
As to Dorset, I'm not sure. Edward doesn't seem to have much of a relationship with Richard of Shrewsbury (their time in the Tower leading up to their disappearance was probably the most time they'd ever spent together), presumably only seeing him (RoS) when he was brought back to London. So Edward is gonna be closer to Richard Grey than Dorset (simply by pure dint of the familiar versus the strange).
Morton's in reserve for now. Alcock seems more likely to serve as a "bridge" between Rotherham and Wolsey (Alcock was Edward's tutor in Wales AFAIK, so he's gonna presumably start out with either guys he inherited from his dad or give a try to guys he knows and trusts first. Won't necessarily go over well in Westminster, but we'll see).