The immediate ones who come to mind: Duran Carlos Ortiz Monzon M.Spinks Charles Floyd Leonard Whitaker Sanchez Holmes Arguello Who else?
Loma's ring IQ is incredibly overrated. Always has been. Out of the current crop, i think Crawford and Usyk. Both those guys have a much higher ring IQ than Loma.
His complete avoidance of infighting demonstrated high ring IQ, even though people for some reason think you have to be well rounded to have a high ring IQ.
Others not mentioned: Miguel Canto Eder Jofre Jose Napoles Mike McCallum Lennox Lewis Andre Ward Juan Manuel Marquez Harold Johnson
I wasn't aware until now that Napoles had a booze problem. I know Carlos Ortiz was a huge alcoholic, but I didn't know Napoles as well.
It was mostly during the 70s after Napoles became champion that alcohol became more of a problem for him and he would stink of alcohol during training camp. Despite his skills and talents he was surprisingly not the most dedicated fighter when it comes to actual training.