Actually, no.
He beat/schooled Valentijn, another tough mofo at that time, and by heel hook no less (Valentijn was quite good at it)
Remember> Valentijn could be considered a ranked win in 2001:
Stephen Quadros Top 10
Last Updated Friday 6-1-01
HEAVYWEIGHT 205 lb and up (93 kg and up)
1. Mark Coleman
2. Igor Vovchanchyn
3. Rodrigo Nogueira
4. Randy Couture
5. Kazuyuki Fujita
6. Heath Herring
7. Pedro Rizzo
8. Semmy Schilt
9. Valetijn Overeem
10. Tra Telligman
His loss to Aleks Emelianenko was a close one, split dec.
And at the tail end of his career, he lost to Kongo (majority dec) and dec loss to Sylvia, while being severely undersized
(in that transitional era, he could no longer be realistically considered a legit natural HW)
imo his skillset was worth noting: interesting mix of sheer violence on the feet coupled with a legit submission game, mostly leglocks.
Good fighter.