Skill/ability wise, maybe. But he lost his biggest fights and has displayed mental weakness on a few occasions. To be honest I'm not an expert on the 140ish scene in the late 90s so I can't comment on that so much as on Judah's career as a whole.
He lost the rounds when he got put down by Millet and Bergman and looked genuinely shaken up, but his fast pace and explosiveness overcame those crises', he did show vulnerabilities even then though mentally he was very very fragile, no doubt about it, that was the difference between him and Mayweather, oh, and his chin
That period coincides directly with the P4P king and the best fighter of the 90's, Mr. Roy Jones Jr. So no, he wasn't the greatest of that period, but at his peak he was a very slick and powerful offensive fighter.
Who was better in his divisions during that time? And his competition level was waaaaaaay above that of Roy Jones anyway.
Zab better than roy eh fuk off. Zab was skillful thats it. U need much more than skill to be the best.