On the topic of the Howards, is it likely that John Howard could be made Earl of Oxford, as he had taken much of the de Vere lands (the original Earls)? I thought it might work in my Yorkist TL anyway.
That's actually an interesting idea. I was planning on just bumping him up to earl of Surrey, but Oxford as an earldom would work too. (The present earl is currently in exile in Denmark).