Re: Have you really thought about it???
Russia, let me think:
Err.. I am not suggesting Russia has anything to do with the running of the Internet.
Simply, their paranoia that US government/ICANN and other "internet independence" arrangements are merely a facade and US govt may at any time do the usual "I am altering the deal" is quite clearly fully justified and they are being frank about it instead of being let's say Chinese.
Now, who can run the key root net structures independently and remain neutral is an interesting question. Out of the list you suggested an organization HQ-ed in Switzerland is the only one which is sufficiently independent. All the others can have their arms twisted and have had their arms twisted for various "deals" in the recent past. I would not trust their continued independence.