chagaev ( I dont think ruiz was prime when they fought) ibragimov anthony joshua wladimir klitchko (pre sanders) Lennox
All of them beat Ruiz, particularly if he's not allowed to violate the rules against excessive holding - although Don King might get him a gift decision like he did against Golota.
Old Ruiz won 5 rounds against a prime Chagaev. Some had him winning. Though it was a different Ruiz, no hugging but inside fighting. He beats Ibragimov and Joshua.
He'd lose to all unless Joshua is more limited than i think. He'd be competitive with Iggy and Chagaev though.
