In his prime, Roy Jones was the best in the world
Never!
If you're not The Man at Heavyweight, then you're NOT the Best in the World!

Jones' prime was late '94 (Toney fight) till early '98 (Virgil Hill fight).
At that time, the top Heavyweights in the world were:

Big Daddy Riddick Bowe
Big George Foreman
Michael Moorer
Iron Mike Tyson
Evander Holyfield
Lennox Lewis
Atomic Bull Oliver McCall
Tommy Morrison
Merciless Ray Mercer
Andrew Golota
David Tua
Larry Holmes
Ike Ibeabuchi
Tim Witherspoon
Donovan Razor Ruddock

Roy was a phenomenal athletic talent, maybe the greatest athletic talent there's ever been in boxing, but he would've been squashed like a peanut by any of those guys above if he fought any of them at that period.