As Hegel pointed out, the other answers of the German Idealists were not very good, and some were simply nonsense.

I should mention that I prefer Neo Platonic thought myself as that looks to me to be the closest to reality. Not Plato alone nor Aristotle alone. Dr. Kelley Ross definitively goes in the Kant-Plato direction. But most of the great thinkers in history that form the basis of Western Civilization go with the Neo Platonic approach.

To Plotinus, Reason can perceive the forms, not just know them from some kind of implanted knowledge.
[And I have to say the Hegel is about as Neo- Platonic as one can get with the Divine Mind emanating reality].

In any case, my own viewpoint in this direction I should admit was very much influenced by Rav Isaac Luria. When I was in the Mir in NY I spent a great deal of time between Gemara sessions in learning his Tree of Life [עץ חיים] which is thoroughly Neo Platonic. [The Tree of Life [עץ חיים] was actually written by Reb Haim Vital, but it is the teachings of the Ari.] [The Reshash/ Rav Shalom Sharaby I learned only later.] 
[The רש''ש Shalom Sharaby  made an important move back to Aristotle in saying in putting the order of the world horizontally in the time of תחיית המתים revival of the dead. That means saying the universals depend on particulars.]

As a support to the Neo Platonic view I might mention that the observer has a radical effect on reality. For we know from the two slit experiment, and especially from the fact that Nature violates Bell's inequality. 

 But Reality is also radically objective,--  the Schrodinger equation  is about as objective a law as anything that has ever existed as Dr. Kelley Ross wrote to me. In any case, the contradiction between reality being radically subjective and radically objective is exactly the type of thing that Hegel would have thought validates his system.

[I also want to add that to come up with the kind of Neo Platonic thought that is in the Rambam, the Ari, and Aquinas and Hegel is by no means a trivial feat. If you think that with simple faith in the Holy Torah and in Reason, you would have come up with this synthesis on your own then take a look at Hippolytus and see how hard it was to reconcile reason and faith and how radically different Plato is from the Neo Platonic synthesis of the Rambam.]

(note 1) The electron has no one value [energy or time, momentum or position in space] [but rather a superposition of possible values] until it is measured which is proved by the fact that Nature violates Bell's inequality.
[Feynman makes the point even more clear with his path integral approach.] 

As I put this elsewhere: We know from Einstein locality (causality). This we know by GPS (global positioning satellite). And we know from Bell either that reality is subjective, or non local (one or the other but not both). But we already know from Albert Einstein, that reality is local. Therefore putting 2+2=4 together we know reality is local and subjective (the electron or photon is a superposition of possible values in space time and polarization until measured. At that time the wave function collapses to one space time value.)
I also should mention that we might have known this from the two slit experiment, but there might have been ways to explain that away. So it is in fact that Nature violates the Bell's inequality that proves the point.

There are good reasons to go with Hegel which is thoroughly Neo Platonic. No one liked Kant's answers for the synthetic a priori and, as Hegel pointed out, the other answers of the German Idealists were not very good.  Fichte was a disaster as Hegel also pointed out, and Kant also pointed out the problems in Fichte.