FIGHT ME
For the three nationals I went straight Roy at (FC:6, Pound 3, Genesis) I placed at approx the 25% mark. No other Roy mains I know of come close to those placings at the time. Ripple and Ninjalink are the only other ones I can think of, and both of them placed below me. NEO and I tied in placing at Pound 3, and he went more Marth than Roy afaik.
In my prime, I'm confident that I was the best Roy for that period, pretty much hands down. I didn't have any massive victories, but I had small ones like taking games / sets off of players like Mango / Forward / Eggz / Hugs / Caveman / other texan heavy hitters, and no Roys that I know of HAVE had major victories, aside from NEO's old glory days.
It debatable whether or not other Roys were better in their prime than I was in mine (NEO is a goddamn legend, Umbreon apparently had a lot of success in his time), but its pretty difficult to compare head to head when we had our prime in different time periods, with different tech and a different overall metagame.