Hogan is irreplacable. The way he combined the dominating persona, with his role model attributes made him such an icon. His patriotism during the end of the cold war, his say your prayers, eat your vitamins mentality. He combined so many things to make the perfect wrestler. Now all the already mentioned wrestlers had their own charisma, but none of them interacted with the fans the way Hogan did. Cupping his ear, doing everything to get a reaction from the fans. He made it entertaining.
With everything above said, he was a role model above all else. Lets face it, no parent wants to see their kid watch a hell-raiser because kids mimic that. Sting and Warrior not such a good idea because the paint prevents a face from being linked to the name. Macho Man did not have the build, and honestly just had an annoying voice. The Rock would be the closest, but come on, everything given to him and he took his fame and left the company. He had the strength, the charisma, but he also lacked some role-model type attributes.
Let's say one thing, Vince McMahon under no circumstances made Hogan. And we can say that anyone given the push he got would be able to succeed like he did, I disagree. I don't think most wrestlers could handle all the fame he had (movies, TV, lunch boxes, toys, shirts, bandanas), all the appearances, being under the radar the way he was. It is a lot of stress. He not only handled that amazingly, but he also took his push, stayed committed to the business, and ran with it. He lead arguably the most dominant stable in history (no stable had the star power of Nash, Hall, Savage, Giant (Big Show), Curt Hennig, Scott Steiner), he was both the ultimate face and the ultimate heel. He carried the two biggest wrestling companies in history to their peaks.