What about Leo Viera
?
amazingly he only won the Mundials once.
Will try to put the CBJJO and perhaps CBJJE in their too. Will have to use the web archive since the CBJJO site went down last time i checked.
royler got third in the open weight once too (in '97). . . if there's ever a version 2. . .

good spot, put it down in the wrong section, yes he took 3rd in open, not weight.
Check Saulo again, I'm pretty sure he won the Absolute one year in the finals against Dada.
Did recheck, 2 time runner up. No idea who Dada is? but there have been 13 winners since 1996 and they are all accounted for.