Aside from Ouma, I'd say Curtis Stevens or Murray. Both actually fought back and at least gave Golovkin a little bit of pause.
I cant name just one Rosado , stevens, macklin, murray ,rubio are all about the same n there all good wins
There is no one today besides Golovkin could have beaten Murray at 160. And Golovkin flattened him easy work.
Murray easily. He actually beat Martinez and should have won the wbc belt Martinez narrowly escaped with in his hometown. So if you think about ggg is already the wbc champ.. And cotto is just the epitome of what is wrong with boxing since Martinez should have never kept it against Murray and instead sold it the highest bidder knowing he was done..
Probably Murray. Rubio has a good resume, if padded. Geale is good if not weight drained to a cadaver. Stevens, I thought gave him a reasonable fight. I think Stevens could give either Cotto or Canelo a really bad day at the office.
Murray and had he actually showed up to fight and not just to miss weight and collect a paycheck Rubio.