I've read your posts for the last few pages and dude... come on. You can't be THAT unreasonable towards other artists. Granted it's your opinion but to be so unreasonable just isnt fair to these guys at all.
Usher and JT are famous because they have talent, regardless of how you view it. They can both dance great, and sing perfectly fine too. You don't get lucky one morning and a record exec picks you to be the next big thing, it all starts somewhere. They have both sung live and performed at big events to massive acclaim. Just recently JT performed here in Australia and the praise couldn't have been greater for him. I never went myself but good on him for putting on such a fantastic show (as everyone who saw it said).
The biggest gripe I have with some MJ fans is their total lack of acknowledgment to other artists. Regardless of genre, talent, looks and history there always seems to be a large contingent of fans who simply wont accept the praise of someone other then Michael. Even Janet, his own sister gets picked at immensely sometimes.