Richard of Shrewsbury: Since his brother isn’t marrying Anne of Brittany, he is, which means that his poor de Mowbray wife is in need of another husband. Gloucester might push his son’s suit, but Edward, because he has to deal with a bunch of crap relating to his dad’s shady deals with the nobility, is not going to let that one fly.
The Berkeleys, who should’ve been the next heirs, were disregarded on grounds of the marquess being in debt up to his eyeballs and also his son being deceased, and his brother disinherited (due to a disadvantageous marriage), he lacked heirs and means to support the dukedom. He later willed the marquessate to the crown IIRC, leaving little brother with only the barony.
The Howards, who would’ve inherited should the Berkeleys have been unavailable, were OTL considered of little consequence, and only got the dukedom in the reign of Richard III, lost it because of Bosworth and got it back a short while later.
Here, Elizabeth (OTL’s Anne) de Mowbray, is marrying the same Thomas Howard as married Anne of York OTL. The Berkeleys are perhaps going to kick up a fuss, but all Edward had to do OTL was settle the marquess’ debts and he was willing to sign on the dotted line. I figure it’s unlikely that this will change here.
The Holand Inheritance: The lady Anne will not be marrying the marquess of Dorset, despite the fact that he wants it to happen, and the queen’s in his corner. The rapaciousness of the Wydeville clan is still within living memory, so I could see the king wanting to prevent that same shadow from looming over his reign. The Holand coheirs have been forced to buy their inheritance (minus the choice bits the crown swiped) back from the king. They’re not happy about it, but it’s not as though they can tell the king what to do.
The Kingmaker’s Inheritance: to be split between the dukes of Clarence and Gloucester. However, the Neville heirs, OTL created and then uncreated earl of Northumberland, marquess of Montagu, duke of Bedford etc. is going to survive his early death here (I can’t seem to find out what killed him in 1483, so I assume it’s not set in stone). Anything he wants back from that – I’m not sure, but Margaret of Clarence was created Countess of Salisbury and her son was styled Lord Montagu, so I’m assuming that he might want either title back – he’s going to have to go the same route as the Holands and buy it back from the crown.
The Clarence children: the earl of Warwick is currently in exile on the continent. He might return to London at some point (I haven’t decided yet), or live out his life in exile and end up being created duke of Clarence/Warwick by some foreign power who’s got a beef with London (I’m looking at you, France) as a sort of combo between Perkin Warbeck and Robert Dudley, Duke of Northumberland.
As long as her brother remains in exile (and technically ‘dead’ to his title), his sister, Marge, is a rather choice heiress. Gloucester’s going to be petitioning for her to marry his son, but Edward V, not wanting to create another Warwick-King faction, is going to stomp on that. Hard. The queen (from what I can find out, Margaret was in Elizabeth Wydeville’s household OTL) is obviously going to try and marry her off to a Wydeville relation. Which might fly, might not, haven’t decided yet (especially if Edward V is trying to be more conciliatory toward the nobility and smooth feathers his dad might’ve ruffled).
The Nevilles: The children of the Marquess of Montagu (also the only non-Percy earl of Northumberland AFAIK) are in an interesting space. Obviously, as the children of someone who was attainted as a traitor, they don’t have the most thrilling prospects. The eldest child, Anne (b.1458) married William Stonor, next girl, Elizabeth (b.1464) married Baron Scrope of Masham (brother or father to the Scrope boy Richard III slated to marry Cecily of York), Margaret (b.1466) married John Mortimer and then our very own Charles Brandon (her niece did, too), so he might make an appearance in that regard. The remaining girls, Lucy and Isabel, married knights. The fact that they managed a Scrope (who was clearly in some sort of favor with Uncle Dickon) and Brandon (who was an opportunistic groom if ever there was one) seems to indicate that these Neville cousins weren’t as far fallen as might be thought. Margaret was a widow, but clearly she either had some land left her by her husband, or else Brandon would’ve seen no use in her. Same goes for her niece, Anne Browne, who married Brandon two years later. He wouldn’t have married a woman nearly twenty years his senior (Margaret) if she brought nothing to the table.
The Clergy: Lionel Wydeville is the only one of the king’s relatives in the cloth, so I could see the king pushing him (in spite of his age) for some of the plumier posts that have fallen vacant with the passing of the Old Guard. Morton might also climb some, but I must confess to being rather ignorant on the clergy at the time.
Margaret Beaufort: She’s sitting on the Beaufort inheritance, but unfortunately, she’s not the only co-heir, and her relation to the last duke was further from the table. What she has got working for her is that she’s popular at the Yorkist court, and married to a Yorkist noble, in spite of her Lancastrian blood. Her only child, Henry Tudor, will be making an appearance soon when he gets restored to his earldom, after he’s begged forgiveness and after Maggie B has made a considerable donation to the king’s coffers. Then, he’ll be married off to Elizabeth Herbert and that’s the Tudors dealt with. Jasper might/mightn’t wed. If he does, it won’t be to the dowager duchess of Buckingham or the like, so he’ll probably take some girl from a good family and may/not end up with one or two kids (haven’t decided yet).
The Beaufort Inheritance: Thanks to Elinor Talbot birthing a son, Edward, in 1468, from her wedding to the last duke of Somerset, this little boy (who may or may not be the king’s half brother) (Not making this up, Elinor had a son by Edward IV OTL, Edward never acknowledged the boy (to my knowledge) or he died young) is the heir to the Beaufort fortunes. However, Edward V isn’t going to hand him the title of duke of Somerset back. So, he’s simply earl of Worcester until he gets promoted. Plus, (legal) dad being a traitor doesn’t really help matters, so he’s lost a considerable amount of his lands/income to his aunts (Lady Stafford, duke of Buckingham’s mother; and Lady Butler, great-grandmother of Mary, Anne and George Boleyn as well as Mary’s first husband OTL