Consider for a moment when you give an opinion. The main thing is if its true or not. Just guessing at something or agreeing with a spammer and being totally wrong is not doing anyone any favors. Especially if someone doesnt know any better and believes you. In the case of this photo the OP wants to know how to get more detail in the blown out highlighted area of the sun. It seems that VIP and myself are the only ones who have offered a solution, based on experience, which you say isnt possible or not worth trying. Encourage someone to at least try it before giving up. The final doesnt have to look cartoony at all. But thats up to the OP to determine. You obviously dont have much experience with HDR and thats ok. If the OP had taken a few more underexposed shots, it wouldnt have affected the foreground since it would be totally black anyway. Only the highlighted area would be affected. When detail was achieved there it could be added to the other images to create something which the OP has asked for.