Obviously Oscar De La Hoya had the best opposition since probably Muhammad Ali, but he didn't look that great against anybody near his caliber, yet Roy beat Hopkins quite easily, and he dominated Mike MaCcallum, James Toney, and Reggie Johnson. My point is that Oscar didn't dominate his better competition the way Roy did. He beat them, but Whitaker and JCC were older and much naturally smaller then Oscar. Had a rough fight with Quartey, a rough fight with Vargas, Mosley beat him. I think OScar was always a great fighter, but when he fought his best opposition he never stood out, yet Roy fought better, and dominated more against better opposition.
He didn't even try that hard against MaCcallum and won virtually every round, a guy who went on to fight very well against James Toney. Look what Roy did to MOntell Griffin in their rematch. Montell Griffin totally outboxed James Toney. He also fought a really good fighter in Virgill Hill, guess what happened? 4th round ko. He fought a good fighter in Julio Gonzalez, beat him up for 12 rounds and knocked him down three times. He fought a good fighter in Eric Harding who had just outboxed Antonio Tarver, Roy beat him in a tough fight, but Harding quit, and Jones was ahead by 2 to 6 rounds on scorecards. He beat a good fighter in Clinton Woods who was almost as good as Glen Johnson, but people thought he should retire because Roy dominated him so thoroughly. Roy then went up and beat John Ruiz(who I believe beat Evander HOlyfield) and won almost every round including hurting John Ruiz. He came back down beat Tarver after badly weight draining himself. Then the bad stuff happened. But before that these were all good fighters, who continued to be good and he made them look like Oscar made club fighters look.

People need to stop underrating Roy's opposition he fought the best guys at 175, except Dariusz who wouldn't come over to face him(A guy Juilio Gonzalez beat twice). But you can't unify the belt without fighting goood fighters and Roy had to beat Reggie Johnson, Virgill Hill, Loui Devalle, and Montell Griffin to unify the belt those are bad fighters.

Evander Holyfield never weighed 175 for a fight, and he fought around LHW 4 times, Roy Jones Jr fought at 154 for 20 some fights. That would make Roy at 154 pounder naturally if you are going by that. In fact Roy fought more fights at 154 then Holyfield fought at 175ish and crusierweight combined. I think Evander Holyfield at heavyweight was equivalent to Roy at 175, but look what happened

I felt Quawi beat him the first time they fought at cruiserweight
Riddick Bowe beat him in their trilogy
Michael Moorer even beat him.
He beat an old George Foreman who wasn't bad, but wasn't even close to what he was. He beat shell of the real Mike Tyson, He beat Buster Douglas, but besides the Tyson fight was largely a joke, he fought a good Ray Mercer, but that was good close fight. Lennox Lewis stomped him the first time, and the second time I still felt Lennox won.

Then at the end of the 90's Evander lost twice IMO to Lennox Lewis.

He isn't even in the arguement though, as great as he is. I have never heard of anybody who thought Evander HOlyfield was as good p4p as Roy Jones Jr.

Many people would argue Holyfield was one of the guys Roy Jones jr could go up to heavyweight and beat.

Make an arguement for Pernell Whitaker if you want, but otherwise in the 90's I don't there is another candidate that comes close.