I for one would like somebody else.
As awesome as that image is and how great he was as a character to found the Horde my opinion is that he has moved beyond the role.
Garrosh will need to be removed and I have no doubt Thrall will work to do it to correct his mistake but I do not think he is the one to lead the Horde into the next golden age unless he suffers a tragedy by losing Aggra and/or his child.
My own opinion is that Thrall lacks the fire he once had to lead the Horde to war and he would need to get it back before he is fit to rule again.
In the absence of Thrall Nazgrim or Saurfang make ideal replacements.