I'd say SainTD, he used to be a tough duel player and he was also ready to lose his TC if you rekd him ingame. He's the guy who won hampa $1000 tourney. Althrough, he's inactive.
From actives, it's probably like Shmevin, Cold or Shockey, dunno which one exactly.
Video makers is another thing, their quality is understanding replay making and putting in time to make fancy replays, but ingame they're not close as strong as duel players and will lose to duel players like very most of cases.