Chocolatito is still looking good. He just had one bad performance after his trainer died. And Viloria is Hawaiian, but I guess he's ethnically Filipino.
Can't believe I left out Gerry Penalosa who also deserves a shoutout as well. Perhaps he too might have done enought to earn a place in the HOF as well?
This! Wonjongkam is the most underrated fighter of our era. Everyone seemed to acknowledge him. But not the reality of his greatness. As for the Filipinos you've listed, I think the first three are first ballot shoe in obvious picks. I do think Viloria falls well short.
Penalosa might have a tougher time though. But in his case he was on the wrong end of some decisions like the morel and de leon fights.
The Segura win was huge. (Segura, another low weight fighter that should have made people gushing during his short peak)