Not sure if you're serious about the top 3 part--certainly don't agree with that. However, I do think he was the best NHB fighter at the time he beat Severn--and that's saying something. He also beat Oleg and would certainly win a decision vs. Royce if there were judges. He later lost a close, controversial split decision to Severn. Then he left the sport just as guys like Coleman and Kerr hit the scene. While I don't think he'd beat them, I think he'd remain a Top 5 HW for several years if he didn't move to pro wrestling.
Yes, his skillset was limited, but there were no true well-rounded fighters in the mid-90s. The closest were Ruas (who never could beat Oleg) and maybe Frye, who couldn't beat the much bigger but less well-rounded Coleman. It's not fair to compare any of these guys with current well-rounded fighters. They have the benefit of almost 25 years of evolution and training. And we still have somewhat successful HWs like Derrick Lewis whose skillset isn't much different than 1990s HWs.