I'm a huge Shields fan... but based on their grappling match (I was rooting for Jake) I would say Marcelo is quite a bit above on the incredibly awesome scale. And also (grapple math, I know) based on both of their rolling sessions with Askren. Jake pretty much got the better of Askren, but Marcelo made him look like he was grappling with a kid, or a student, pretty lightly it seemed, and was just TOYING WITH HIM. An Olympic level wrestler, and NCAA legend. Just... toying with him. Shit, I'm an Askren fan too and a wrestler so that was even kind of hard to watch. Obviously taking nothing away from Shields. My idea of the ultimate grappler would be a mix of those two actually. But yeah, Marcelo is on another level kinda. Just my opinion.