Mystery or not...?

Sir Ralph Bigot or Sir John Bigot was the actual Lord Mauley who was killed at Towton?
According to Mr. Graham A. Darbyshire in his booklet, The Gentry & Peerage of Towton, Vol. 1 it is Sir Ralph Bigot (or Bygod):

And here is a fragment from a List of Towton Combatants:

There are two Lord Mauleys!
In another source (1889):

 Mr. Clements R. Markham says:

 But, I found another book written by Mr. T. C. Banks.:

and looks like he "confirms" information given by Mr. Graham A. Darbyshire: