Philosophers (whether in academia or outside) seem determined to disagree with each other even when their positions are close. Michael Huemer basing himself on the Intuitionalists like Prichard see that reason recognizes universals. Is that  all that far away from the Friesian school of Leonard Nelson and Kelley Ross where first principles are known but not by reason or the senses? They are reasonable (not infallible). Greta Hermann thought that Nelson meant "infallible" and thus went away from the immediate non intuitive approach(-and it might be that in fact that is what Nelson thought). But that its not implied by the Friesian doctrine as Kelley Ross point out.

And while I am at it, is this all that far from Hegel who reaches absolute knowledge by a dialectical process. [This may not be obvious to people unless, you read the Logic of Hegel that was part of his Encyclopedia.]

I mean where would Physics be today if Einstein had decided to attack the concept of the quantum? Or even more striking is that in Quantum Mechanics every incremental step was done by a different person building on the result of some previous person.][not attacking previous results]

[i might mention here that all of this is post Kant and all these people did not ignore Kant but rather tried to deal with the difficulties he raised. Huemer is from  the Analytic tradition starting with Frege. Nelson and Fries is a modification of Kant. Hegel is sort of his own category  but still does try to answer the problem raised by Kant. 

furthermore i must mention that at least a significant number of Rishonim did not ignore philosophy not Plato nor Aristotle or Plotinus nor the later Muslim Philosophers and so I think the great Post Kant Thinkers are important--but not all. After all I do agree that most post Kant philosophy is worthless--but I do know that to see the flaws takes a certain amount of experience and expertise.