Contains Dos santos Rogerio Nogueira Rodrigo Nogueira Anderson silva... Here's the rest http://www.sherdog.com/fightfinder.php?search=yes&association=Team Nogueira it's not like they're all at the top...but the ones who are participating in the ufc are doing great for the most part.
There isn't really one team; there is Black House, which is where all the top guys like Machida, Anderson Silva, Nog, and a few others train for fights, but then they all run their own teams, even those teams overlap though. It's a lot like the situation in Vegas with Coutures; there is a fight team, but there are a lot more people who train there part of the time that aren't part of the pro fight team. It's the way of the future, guys congregate around one "super gym" type place for high level sparring, but also go to different "school" type places to refine different aspects and get different looks at things.