To answer the question, here's how I think he'd do against Sherdog's current top 10:
1. Anderson Silva
Jacare's style is probably the most dangerous for Silva. Nobody at MW can strike with Silva, it's the wrong strategy to even try. Strong takedowns and excellent BJJ are the best shot, which make Jacare (and Weidman) the best matches. I think Jacare still probably loses this fight more often than he wins, but at least he has a conceivable path to victory, which is more than can be said about most of the division. Doesn't matter though, they probably won't fight.
2. Chael Sonnen
Jacare beats Sonnen handily. Think Sonnen-Maia.
3. Chris Weidman
Who knows how this would turn out, I'd love to see this fight down the road some time. If would probably be decided on the feet, where both are green but improving so fast in every fight that it's hard to call.
4. Michael Bisping
This would be one of the toughest fights for Jacare. I don't like Bisping at all but his TD defense is impeccable and he'd outpoint Jacare on the feet.
5. Mark Mu