Dear Hopeful,
At least in my opinion you try to do it the wrong way around and with a mistake!
At the moment when the egg will hit the top surface it has also its top speed. But in my opinion exactly at this moment you need the liquid with lowest density and viscosity to generate not to much resistance for the egg, otherwise it may break already there.
Now you can used other solvent layers with increasing density to decelerate the egg enough.
In my first Idea to make it not too dangers and too toxic I would try the following three layers from the top: Heptane or Octane / Water / 15% Methyl-Cellulose. The disadvantage of this would be, that the 15% Methyl-Cellulose layer is not a clear visible layer and that you have to be carefully when you over-layer it with the water.
In case that even Heptane would be to density you may use the little more danger Hexane instead.
I hope it may be of help to you.
Good Luck!
ARGOS++